Enable your "Advanced Settings," and then turn off "Psycho," which can be found under the Advanced Settings tab. For most people, this will kill the lag completely (your results may vary).

I posted in another thread about this, but I managed to end all my skipping/lag problems by turning "psycho" off (which can be found under the Advanced settings). I don't know what that setting does, but ever since I turned it off, I have run 100% smooth for over a month. The game never la...

This is my first post here. I used to have the same problem (lag and skipping), and I toyed with the settings for quite a while. After a lot of work, I was able to run FoFix with the Rock Band 2 and Guitar Hero III themes at 100% speed all the time (it never lags or skips anymore). Here's what I did...