https://runuo.googlecode.com/files/LegacyMULConverter-v4.rar Extract LegacyMULConverter into a folder (C:\LegacyConverter is where mine is, replace this address with where you have yours) 1. Windows Key + R 2. type cmd and press enter 3. type- cd C:\LegacyConverter (remember to change this to your Legacy MUL Converter folder location) 4. Unpacking: type- LegacyMULCL.exe -x "E:\Program Files\Electronic Arts\Ultima Online Classic" press enter. (remember to change this to your UO folder location) 5. Repacking: type- LegacyMULCL.exe "E:\Program Files\Electronic Arts\Ultima Online Classic" press enter. (remember to change this to your UO folder location) Notes: Legacy MUL Converter will not unpack or repack if the file already exist. Move or delete the file you're wanting to update before beginning. I have found that the repacked uop(s) need to go into the UO folder, as well as the custom data location (if you are using a custom data location) I leave a set of unpacked muls for UOFiddler and many other programs in a separate folder. You do not have to use the UO Folder, you can unpack and repack into any folder that has the uop/muls. I hope this helps.