Since just about all the games you've mentioned should not cause problems it makes me wonder if they could be bad rips from your discs. If you followed maui's any wii guide to a T then you should not be having problems. I would try removing them completely from the hdd and installing them from disc again. Another suggestion I would have would be to try another loader like wiiflow. (even though cfg is a good loader.) Hope you get them up and running! Sounds like you're not a noob so that's the advice I'd offer. If that doesn't work, post back and we'll try to figure it out.