Out of curiosity, is the game launching in full screen? May want to try Alt+Enter a few times. Just an idea :\
Also at what points does the screen turn black? You say when p99 launches, however you don't launch p99 you start eqgame.exe Is it after you log in or before?
I start my eqgame.exe with a bat file as instructed. Make a new txt file in your base eq game directory and paste this inside it.
Code:
start eqgame patchme
Then rename the txt file to something like StartEQ.bat
These things may not help solve your problem, but any more information you can provide will help us help you get to playing!