diff -r b046cf080755 -r 91f2e0437e12 plugins/include/files.inc
--- a/plugins/include/files.inc	Tue Jan 22 16:47:10 2008 +0000
+++ b/plugins/include/files.inc	Tue Jan 22 17:04:59 2008 +0000
@@ -302,9 +302,13 @@
  * Checks if a file exists.
  *
  * @param path			Path to the file.
+ * @param use_valve_fs	If true, the Valve file system will be used instead.
+ *						This can be used to check for the existance of files 
+ *						inside GCFs or the game cache, rather than solely files 
+ *						that are on disk.
  * @return				True if the file exists, false otherwise.
  */
-native bool:FileExists(const String:path[]);
+native bool:FileExists(const String:path[], bool:use_valve_fs=false);
 
 /**
  * Renames a file.