Check this out... This worked for me..
Copy/Paste the following in notepad and save it as a .reg file... import it in your registry and bam!
CODE
Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\Folder\shell]
@="xplorer2"
[HKEY_CLASSES_ROOT\Folder\shell\xplorer2]
[HKEY_CLASSES_ROOT\Folder\shell\xplorer2\command]
@="C:\\Program Files\\zabkat\\xplorer2\\xplorer2_UC.exe \"%1\""
[HKEY_CLASSES_ROOT\Drive\shell]
@="xplorer2"
[HKEY_CLASSES_ROOT\Drive\shell\xplorer2]
[HKEY_CLASSES_ROOT\Drive\shell\xplorer2\command]
@="C:\\Program Files\\zabkat\\xplorer2\\xplorer2_UC.exe \"%1\""
[HKEY_CLASSES_ROOT\Directory\shell]
@="xplorer2"
[HKEY_CLASSES_ROOT\Directory\shell\xplorer2]
[HKEY_CLASSES_ROOT\Directory\shell\xplorer2\command]
@="C:\\Program Files\\zabkat\\xplorer2\\xplorer2_UC.exe \"%1\""