Hi Luis, Wish I would have known this before I did all the things I just finished doing. I figured out that I was missing cl.exe and so I grabbed the latest visual studio 2008 express and installed it and then encountered problems with path variables. So, I updated all of the path variables and went to run the gem install and encountered the .. MSC Version Mismatch error.. At which point I looked through the doc notes for opengl and saw that the compiler has to be MSC 6.0 (which I believe the latest version I have is not compatible). So, before I go heads into another session of fix this/fix that.. let me make sure I understand what it is you are saying.. The version I need is no longer available unless I have a license so I need to play with the one-click-installer that's based on GCC? No other way around it eh? -- Posted via http://www.ruby-forum.com/.