1. Creat a folder somewhere on your pc
2. Put XS++, Main and Fs in this folder
3. Within this same folder create another folder called Own_custpack
4. Extract the custompack into the Own_custpack folder
5. After extracting custom pack, the Own_custpack folder should now have another folder called tpa.

To Flash.
1. Connect your phone
2. Select Main and FS and Own_custpack
3. Press flash and wait until finished flashing.