Hi, I saw that solution on fixing the 60Hz problem with DetXP 27.xx and W2K/XP by Jeronimo, and want to point you to another solution I thought of about a week ago (I'm a Moderator at SysOpt.com and even posted it there). Here it goes :

As you probably know, monitor .inf files often host information about possible resolutions/refresh rates the monitor can support. And Windows takes that information directly from there and uses it, both for desktop and for gaming. So I decided to modify the .inf file, and it works much simpler than modding all those values in registry (which can also be quite risky, too).

I have 17" LG Flatron 795FT Plus, and here's the example (note the change) :

Before :
[Flatron795FTPLUS.AddReg]
HKR,"MODES1600,1200",Mode1,,"30.0-96.0,50.0-160.0,+,+"
HKR,,ICMProfile,0,"795FTPL.icm"

After :
[Flatron795FTPLUS.AddReg]
HKR,"MODES1600,1200",Mode1,,"30.0-96.0,100.0-160.0,+,+"
HKR,,ICMProfile,0,"795FTPL.icm"

And that's it !!! I couldn't believe it's so simple. After editing those mere bytes, I simply reinstalled the drivers for my monitor and enjoy gaming @100Hz ever since :D

Yours Truly Smash