Aaagreen is right. Please read the AUP before engaging on the forums.
FPSC X9 and X10 both work perfectly under XP, Vista and Windows 7. If you have Windows 7 select the option to switch UAC off.
@Aaagreen
I started doing a HL2 mod and it was ok but I really didn't like the fact you could only open the development tools via Steam. That just sucks.
I might start looking at this again with the L4D2 tools as there were some restrictions in the HL2 mod which I didn't like such as only 1 dynamic projection light source active at any time. When you use the torch on an enemy projected shadow already being cast the graphics look really bad.
I also didn't rate the Lost Coast level. Oh look everything looks way too bright when I look up and way too dark when I look down ... GREAT FEATURE!
How about just getting the overal scene lighting quality to look better rather than that dynamic retina focusing crap.