I am seriously considering purchasing the above app for the XP based on all the reviews. However, the more I read online, the more I see that a single player based mod has not been perfected as of yet. I play Quake 2 via FPse and absolutely love it. I don't mind paying for an app as long as it can provide the above. What I am wondering is are there any versions (paid or free) of single player Quake (1, 2, additional mods) that have been optimized for XP and/or can play through analog touch pads? Thanks ahead for the help!