Whenever I try to start up D2NT, it either gives me "UNHANDLED EXCEPTION: ACCESS_VIOLATION (c00000005)" Or Says it cannot verify my version.
Any tips to solve this?

when you create a new run, make sure you are pointing the bot into the right directory. in another words, when you click on the auto detect, make sure it is pointing to the correct C:\Programs\Diablo2\Game.exe (that was just an example)
also make sure you have placed the .dll where ever it needs to go