Startup and Install Error

Well, i have been having problems with almost every f2p shooter, the only one working is op7, which kinda sucks...

Well first im trying Warrock.

I have 2 problems, the first one is that when i open warrock, i have to oldish warrock without the GamersFirst Live! thing. But when i open it, it says

"ERROR: Cannot find execute file"

So I thought i would try reinstall it, so i came on, and found the GamersFirst Live! So i downloaded that, it gets somewhat far in the install but then it stopped on the step for installing:

C:\Program Files\GamersFirst\LIVE!\btdna.exe

after waiting for about an hour, i cntrl>alt>delete-ed and ended the install, it said it was not responding

Then i tried it again and it says:

"Error opening file for writing:

C:\Program Files\GamersFirst\LIVE!\btdna.exe

Click Abort to exit the installation......"

So please help, it used to work a while ago, i decided to try it again, now it wont.