Don't worry, you can enjoy widescreen resolutions in Win9x. It just takes a little tweaking. There are several solutions actually.
1) You can mod the *.inf file from your drivers to add the custom resolution with the refresh rate that matches your screen (probably 60hz).
2) You can also try to add the resolution to your registry and reboot. Let me see if I can remember how I did... I think you should go to :
[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\Display\
XXXX\MODES\
Y]and add this key
CODE
[1440,900]
"(Default)"="60,70"
"ModeRefreshRateList"="60,70,72,75,85,100,120,140,144,150,170,200"
Basically, replace the XXXX with the number of your card (usually 0000 on a fresh install).
Add this for 8, 16 and 32, which the Y stands for.
If you did it right and installed your screen drivers correctly, when you reboot, you should have the 1440x900 resolution avaible.

Tell me if it didn't work.