Hi. Sorry to hear you're having issues... The issue is that all the devices have different methods to mount system, so getting one script that works for everyone is very difficult. I'm using a new system mounting tool called SIAM (see link) which claims to work with nearly every device (including the Milestone)
I've updated the LauncherMod.v1.0-1.8.19.zip with the latest version of SIAM so hopefully if you re-download the Mod and flash it as normal it should work. If that fails you'll see a Milestone version in the Launcher directory, that will work but I'd really appriciate it if you could try the updated LauncherMod.v1.0-1.8.19.zip first and let me know if it works.. Thanks..
SIAM