Provided are 2 patched versions of the 21256.18 (17489) xshell.xex. Both have been patched to skip mounting the xlaunch.fdf file and
instead will mount and look for the xshell resources in a folder on your hdd. 
Hdd:/XShellTheme OR /SystemRoot/XShellTheme (Hdd:/Filesystems/17489-dev/XShellTheme on RGLoader) depending on which xex you use.

1. Choose the version you want to use and replace your xshell.xex (Making a backup of the original is recommended).
2. Place the provided XShellTheme folder on your hdd at the chosen location (Depends on the patched version of xshell chosen in step 1).
3. Done... Any resource files can now be replaced without needing to open and replace them in the xlaunch.fdf on pc.

- Byrom -