Getting modelines for my monitor

[Arcady Genkin <a.genkin@utoronto.ca>]

I have just bought a Viewsonic GT755. It's capable of doing 
,-----
| ViewSonic GT775
| .25 17"
| 1600x1200 @ 69
| 1280x1024 @ 80
| 1152x870  @ 106
| $515
`-----
Where do I get modelines for it?

Right now all I have for it in XF86Config is:
,-----
| Section "Monitor"
|    Identifier      "ViewSonic"
|    VendorName      "ViewSonic"
|    ModelName       "GT775"
|    HorizSync       30-86
|    VertRefresh     50-160
|    Modeline  "1024x768"   85.00 1024 1032 1152 1360 768 784 787 823
| EndSection
`-----

My video card is a Diamond Viper330 (Riva128), and it is capable of
doing high resolutions. But for now, if I could squeze 1152x870 out of
it, I'd be quite content.

I'm running Slink with XFree 3.3.3.1, FWIW.
Thanks!
-- 
Arcady Genkin                                http://wgaf.dyndns.org
"'What good is my pity? Is not the pity the cross upon which he who
loves man is nailed?..'" (Zarathustra - F. Nietzsche)