I was installing the FNV GECK and during instalation i got a message saying " The Program can't start because SSCRE5432.dll is missing from your computer. Try reinstalling the program to fix this problem" i had a similer problem with The F3 Geck instalation and was wondering if anyone knows how to fix this.

How did you install the GECK? The contents of the archive needs to be copied into your steam\steamapps\Fallout New Vegas folder.

IDK what happened but when i extracted it for the second time it worked.

but for some reason i cant install F3 GECK, It wont let me extract it to F3.

You don't extract the F3 GECK. That one comes with an installer.