Guide: Cod4X on Linux + Windows stutter fixes (Gpusync, mouse movement, alt tab)

Hey @zaki7 , followed these steps using the Steam installation of CoD4 and when I attempt to run the game I receive the following error:

Impure file iw3mp.exe detected.
Fetching the pure version has failed.
Put original iw3mp.exe of CoD4 version 1.7 into folder or try again.

Now, when I ran the game the first time via Steam I realised I was on version 1.7, but now of the downgrade servers seemed to work. Is there a way to downgrade easily on Linux if the servers don’t work?

EDIT: Found a 1.7 iw3mp.exe file online and that worked.