In my experience, the "Out of Range" issue is fairly common if you don't specify both the xmodule and the maximum screen resolution with the latter being the most important and the fomer making the latter unnecessary when you get it right.
Luckily, the xmodules listed on the cheat sheet are quite limited and self-explanatory.
I've generally had the Out of Range problem disappear by setting screen=1024x768. But if you don't set the right xmodule and your card is a 3D card, you won't get openGL working in games like Legacy Doom. You are playing Legacy Doom on an openGL 3D card, aren't you?