First of all i just switched to linux from windows (ubuntu

) and thinks its super cool 8)
But had some problems that even google couldnt handle
let me try to explain here.
i got a laptop, (HP Pavilion zd800) whit a graphic card (ATI Mobility Radeon X600) as realy kicks a**

but cant seem to find the driver that works, was on ATI's homepage and downloaded a installer from there (sh installer / what that so is :S ) but when i launch ATI controlpanel its says: "Driver not provide the FireGL X11 Extensions! Panel components will operate only partially"
dont know what i have done wrong, and dont seem that i can find OpenGL :s
also wanted to ask what you use, to run windows application on linux?, i got CrossoverX? but then i need to install the software from CD's, cant i run it from my already installed windws?? (windows is mounted, and im dual booting or what its called)
how do you also mount in linux?
would really like to get my math program to work "mathcad 13" but dont know how :s
thinks that was it, ask me if you want more info, and plz help
Hardware:
Windows XP Media Center; Pentium 4 3.6GHz; 1GB 400MHz DDR RAM; ATI Mobility Radeon X600 256MB; Toshiba MK8026GAX 80GB 5,400rpm