If your monitor is being recognized as "Plus and play" then you are using automatic detection. This is bad. Never, never use autodetect. Here is the procedure to fix it:
1. Download the following file:davemon.INF
Here's the comments from the first section of the INF:; DAVEMON.INF
; This is a Setup information file for monitors
; supported in the Windows 98 product.
; It was hacked out of MONITOR6.INF
; I was annoyed that my plug & play monitor was only supported up to 1600x1200 after I discovered
; accidentally that it could display well over 1900x1200. I found this from the default driver
; but that only supported refresh rates of 60Hz.
; I decided to create my own "no limits" driver, which simply enables all the modes of my GeForce2Pro card.
; Copyright (c) 2002, David Pietromonaco
2. Go to your display properties.
3. Click Settings
4. Click Advanced
5. Click Monitor
6. Now, find the check box beside "Hide modes that this monitor cannot display
", and if there's a check in it, UNCHECK it.
7. Next, the first section at the top will say "Monitor Type
". Click the Properties
8. In the window that appears, click the Driver
9. Click Update Driver
10. In the window that pops up, click "Install from a list or specific location (Advanced)
11. Now click Next
12. Now click the second radio button titled "Don't search. I will choose the driver to install.
13. Click Next
14. Uncheck "Show compatible hardware
". When you do this, you'll see lots of manufacturers and models appear.
15. Click the Have Disk
16. In the window that pops up, click the Browse...
17. In the window that pops up, go to the location where you saved davemon.INF and select it, then click the Open
18. Now back at the previous window, click the OK
19. You will now be back at the "Hardware Update Wizard
" window, in which a single Model will now be listed, namely "NoLimits monitor for GeForce2Ti/Pro/GTS
". Click the name once to select it.
20. Click the Next button. A window will/may pop up warning you that the driver isn't signed. Click the Continue Anyway
21. Now click the Finish
22. Back at the previous window, click the Close
23. Back at the previous window, click the OK
24. And finally back at the Display Properties
window, click the OK
OK, phase 1 complete. You have to OK all the windows before the new device's modelist will become active. Now we'll go back in there and see all the modes your adapter will do:
25. Go to your display properties.
26. Click Settings
27. Click Advanced
28. Click the Adapter
29. Click the List All Modes...
Now you can pick a mode to your heart's content. If you have an NVidia card, you can also create custom mod8 resolutions. If your have a DVI device, you may even be able to create non-mod8 ones. Remember though that DivX only does mod4 horizontal resolutions. This does not include 1366, unfortunately.