Hi guys,
It would SEEM that the latest updates from Windows 7 may have fixed the fps drop in cs 1.6, specifically KB982110 and KB2272691. Not sure which one of them did the trick but, after i installed, i tried playing a few rounds and it went smoothly as it would in XP. Adding an extra priority for hl.exe in the task manager will also increase performance.
I tried virtually all the fixes i found while googling, but none seemed to fix my issue. It improved somewhat, but not a permanent fix. Out of all the ideas suggested, i stuck to network throttling off, turned off DEP for hl.exe.
I have a core 2 duo 2Ghz a piece, 2 GB DDR3, and a GeForce 9500 GT, running Win 7 x86.
Hope this helps.
--Wolfyx