Help With Killing Floor GCF?

Okay so I downloaded the Killing Floor and some other GCFS from here. Then I downloaded your MEGA NCF pack. The problem is ***After I extract the .RARS I get a folder. Isn't It suppose to be a .GCF file??*** So heres what I tried: Cracked my steam client and put the killing floor folder into .....\Steam\SteamApps\MYNAME and then restarted steam.......NOTHIN.... ANY help would be loved...Thanks
Keep up the good work with uploadin the files...