diff -up nspluginwrapper-1.4.0/src/npw-config.c.dir nspluginwrapper-1.4.0/src/npw-config.c
--- nspluginwrapper-1.4.0/src/npw-config.c.dir	2011-05-15 21:35:06.000000000 +0200
+++ nspluginwrapper-1.4.0/src/npw-config.c	2011-05-16 08:43:22.217437588 +0200
@@ -41,10 +41,14 @@
 
 #include <glib.h>
 
+#include <asm/types.h> 
+
 static bool g_auto = false;
 static bool g_verbose = false;
 static bool g_allow_native = false;
 static const char NPW_CONFIG[] = "nspluginwrapper";
+static char *p_plugin_dir = NULL;
+static char *p_plugin_prefix = NULL;
 
 static void error(const char *format, ...)
 {
@@ -650,7 +654,9 @@ static int do_install_plugin(const char 
   plugin_base += 1;
 
   char d_plugin_path[PATH_MAX];
-  int n = snprintf(d_plugin_path, sizeof(d_plugin_path), "%s/%s.%s", plugin_dir, NPW_WRAPPER_BASE, plugin_base);
+  int n = snprintf(d_plugin_path, sizeof(d_plugin_path), 
+                   "%s/%s.%s", plugin_dir, p_plugin_prefix ? p_plugin_prefix : NPW_WRAPPER_BASE, 
+                   plugin_base);
   if (n < 0 || n >= sizeof(d_plugin_path))
 	return 3;
 
@@ -743,6 +749,10 @@ static int install_plugin(const char *pl
   if (g_verbose)
 	printf("Install plugin %s\n", plugin_path);
 
+  if(p_plugin_dir) {
+	ret = do_install_plugin(plugin_path, p_plugin_dir, plugin_info);
+  }
+  else {
   // don't install plugin system-wide if it is only accessible by root
   if (!is_root_only_accessible_plugin(plugin_path)) {
 	ret = do_install_plugin(plugin_path, get_system_mozilla_plugin_dir(), plugin_info);
@@ -765,6 +775,7 @@ static int install_plugin(const char *pl
   ret = do_install_plugin(plugin_path, user_plugin_dir, plugin_info);
   if (ret == 0)
 	return 0;
+  }
 
   return ret;
 }
@@ -936,6 +947,8 @@ static void print_usage(void)
   printf("   -h --help               print this message\n");
   printf("   -v --verbose            flag: set verbose mode\n");
   printf("   -a --auto               flag: set automatic mode for plugins discovery\n");
+  printf("   -d --dir plugin-dir     flag: target plugin(s) directory\n");
+  printf("   -p --prefix prefix      flag: a prefix of wrapped plugin file\n");
   printf("   -n --native             flag: allow native plugin(s) to be wrapped\n");
   printf("   -l --list               list plugins currently installed\n");
   printf("   -u --update [FILE(S)]   update plugin(s) currently installed\n");
@@ -968,6 +981,18 @@ static int process_native(int argc, char
   return 0;
 }
 
+static int process_dir(int argc, char *argv[])
+{ 
+  p_plugin_dir = argv[0];
+  return 0;
+}
+
+static int process_prefix(int argc, char *argv[])
+{ 
+  p_plugin_prefix = argv[0];
+  return 0;
+}
+
 static int process_list(int argvc, char *argv[])
 {
   const char **plugin_dirs = get_mozilla_plugin_dirs();
@@ -1063,57 +1088,56 @@ static int process_remove(int argc, char
 
 int main(int argc, char *argv[])
 {
-  char **args;
-  int i, j, n_args;
-
-  n_args = argc - 1;
-  args = argv + 1;
+  int i, j;
 
-  if (n_args < 1) {
+  if (argc < 2) {
 	print_usage();
 	return 1;
   }
-
-  if (args[0][0] != '-') {
-	print_usage();
-	return 1;
+  
+  if (argv[1][0] != '-') {
+  	print_usage();
+  	return 1;
   }
-
+  
   static const struct option {
-	char short_option;
-	const char *long_option;
-	int (*process_callback)(int argc, char *argv[]);
-	bool terminal;
+	const char *short_option;
+  	const char *long_option;
+  	int (*process_callback)(int argc, char *argv[]);
+  	bool terminal;
+ 	int  extra_args;
   }
   options[] = {
-	{ 'h', "help",		process_help,		1 },
-	{ 'v', "verbose",	process_verbose,	0 },
-	{ 'a', "auto",		process_auto,		0 },
-	{ 'n', "native",	process_native,		0 },
-	{ 'l', "list",		process_list,		1 },
-	{ 'u', "update",	process_update,		1 },
-	{ 'i', "install",	process_install,	1 },
-	{ 'r', "remove",	process_remove,		1 },
-	{  0,   NULL,		NULL,				1 }
-  };
-
-  for (i = 0; i < n_args; i++) {
-	const char *arg = args[i];
+	{ "-h", "--help",          process_help,           1, 0 },
+        { "-v", "--verbose",       process_verbose,        0, 0 },
+        { "-a", "--auto",          process_auto,           0, 0 },
+        { "-d", "--dir",           process_dir,            0, 1 },
+        { "-p", "--prefix",        process_prefix,         0, 1 },
+        { "-n", "--native",        process_native,         0, 0 },
+        { "-l", "--list",          process_list,           1, 0 },
+        { "-u", "--update",        process_update,         1, 0 },
+        { "-i", "--install",       process_install,        1, 0 },
+        { "-r", "--remove",        process_remove,         1, 0 }
+   };
+ 
+   for (i = 1; i < argc; i++) {
 	const struct option *opt = NULL;
-	for (j = 0; opt == NULL && options[j].process_callback != NULL; j++) {
-	  if ((arg[0] == '-' && arg[1] == options[j].short_option && arg[2] == '\0') ||
-		  (arg[0] == '-' && arg[1] == '-' && strcmp(&arg[2], options[j].long_option) == 0))
-		opt = &options[j];
-	}
-	if (opt == NULL) {
-	  fprintf(stderr, "invalid option %s\n", arg);
-	  print_usage();
-	  return 1;
-	}
-	int ret = opt->process_callback(n_args - i - 1, args + i + 1);
-	if (opt->terminal)
-	  return ret;
+ 	for (j = 0; j < sizeof(options)/sizeof(options[0]); j++) {
+ 	  if (!strcmp(options[j].short_option,argv[i]) || !strcmp(options[j].long_option,argv[i])) {
+ 	     opt = &options[j];
+        	     break;
+ 	  }
+  	}
+  	if (opt == NULL) {
+ 	  fprintf(stderr, "invalid option %s\n", argv[i]);
+  	  print_usage();
+  	  return 1;
+  	}
+ 	int ret = opt->process_callback(argc - i - 1, argv + i + 1);
+  	if (opt->terminal)
+  	  return ret;
+ 	i += opt->extra_args;
   }
-
+  
   return 0;
 }
diff -up nspluginwrapper-1.4.0/src/npw-viewer.sh.dir nspluginwrapper-1.4.0/src/npw-viewer.sh
--- nspluginwrapper-1.4.0/src/npw-viewer.sh.dir	2011-05-15 21:35:06.000000000 +0200
+++ nspluginwrapper-1.4.0/src/npw-viewer.sh	2011-05-16 08:10:05.185367523 +0200
@@ -100,6 +100,9 @@ if test "$ARCH" != "$TARGET_ARCH"; then
 	    NPW_USE_XSHM="no"
 	fi
 	;;
+    x86_64)
+	LOADER=""
+	;;
     ppc)
 	if test "$ARCH" = "ppc64"; then
 	    case "$OS" in