This is a simple edit i've made to get around WoW errors that pop up from 100+.
This works by never setting the client's UNIT_FIELD_LEVEL more than 100.
The player will be shown as level 100 when targeting but /who groups, character selection and guild they will see their actual level.
Works for ArcEmu and TrinityCore.
Patch Downloads:
Filebeam - Contains both patches.
ArcEmu Pastebin
TrinityCore Pastebin
If you use a repack you cannot use this.
If you don't know how to apply a patch file search MMOwned or the emulator forums, so don't post questions about how to apply/use this.