I recently upgraded to Panther and in doing so forgot to back up my old Diablo files. Gone are my lvl 65 Amamzon, lvl 72 Barb etc.

I took this opportunity to start over again and try playing in OSX.
When I launched Diablo for the first time the only video mode available was Software and OpenGL, no RAVE. Is OpenGL the best mode for my system?
How do I see what frames per second I am getting? I seemed to remember that I could type in "fps" before.
How come my mouse settings are grayed out in OSX?
My system is a 867/G4 tower with Nvidia GeForce2 MX 32MB.
Thanks