My onboard video is an M650, I doubt there will be a specific kext for you (there isn't for me) but it will still display just fine. Bear in mind that if it's a laptop you won't be able to use the Quartz Simple trick since you're not using a specific driver (kext file) made for the SiS chipset. Disabling beamsync still works fine.
In order to change your resolution you will have to edit your com.apple.Boot.plist file though, in my case I added the following lines via the "sudo nano" terminal command:
CODE
<key>Graphics Mode</key>
<string>1280x1024x32@60</string>
It's detected by Darwin as VESA 3.0 compliant so you can have the refresh rate in there as above.
Assuming you're completely green to OS X:
Start Terminal (in your utilities folder) then type the following commands
sudo su (then enter your root (administrator) password - this enters super-user mode so you don't have to authenticate the following commands individually)
cd /Library/Preferences/SystemConfiguration/
sudo nano com.apple.Boot.plist
Use your arrow keys/tab key to navigate below the existing video settings (below the line ending with </key> and above the next <string> one (if applicable)), then enter the code I posted above, replacing the resolution/colour depth/refresh rate with your own settings, make sure you're certain they're supported (IE: You've used them in Windows etc. and know the chipset and display support it already). When you've finished making the changes hit CTRL+O and then Enter to save them.
After that whenever you start OS X it'll be in the resolution you specified.