from another post of mine a few hours ago:
If you're new to grand prix 4 and updating it read
this which is a guide im writing which has lots of background info on updating gp4, it has information on updating normal gp4 wad's but not csm mods, as i dont know how to myself but give it a read anyway as there are lots of things that can help newbies from coming across alot of problems later on
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