Installation:
- Download Spell Mod Pack file and extract it.
- Inside you will find two files.
- Copy first file to: *Your game folder*\nativePC\rom\wp\w1 - overwrite wan.arc
- Copy second file to *Your game folder*\nativePC\rom\wp\w1 - overwrite stk.arc
MAKE A BACKUP! of original wan.arc and stk.arc files just in case you don't like it and want to revert to vanilla.

There are only two files you need to overwrite, so, no need for Nexus Mod Manager and the like, it's easy.
wan.arc - Sorcerer file
stk.arc - Mage file
That means you can technically choose whichever you need and not install one you don't need. Very easy and convenient.