His script replaces the default UVW Edit Window script. Rename \3dsmax8\UI\Macroscripts\Macro_UnwrapUI.mcr to Macro_UnwrapUI.backup, then put Chuggnut's mcr there, named Macro_UnwrapUI.mcr.
Does anyone know how to get Chuggnuts macroscript to load at startup? I use this offset UV feature every now and then. Manually loading it everytime with "run script" is tedious. Also Id like to know how to get the Layer Manager pallet to open on startup as well.. Im using Max8.