if what is posted still gives you problems remove the quotes from the line.
heres what mine looks like and if the quotes are added it gets all grumpy with me heh. its just an example as my eq direc. is on a seperate HD then my OS.
Code:
F:\Games\EQ\eqgame.exe patchme
so try adding it as C:\Program Files\Sony\EverQuest\eqgame.exe patchme with out the quotes.