installation in safe mode should work...don't think this is the rez folder problem. I think this is UI folder problem.
Do this, exactly this--
1. Uninstall game completely, that no sign of crossfire exists on your computer anymore.
2. Re DOWNLOAD the game, from any website.
3. When the installer pops up, press CANCEL. Move your installer to a folder you will remember, or simply, your desktop.
4. Go on safe mode (search it up, I don't want to type it all out)
5. Re-start, which then gets you into safe mode.
6. Find your installer, and install it. In safe mode, all you can do is nothing, but wait until it installs patiently.
7. Exit safe mode, then restart computer.
8. Patch the game. (OPEN AS ADMIN IF ON 7 OR VISTA)
9. After finishing patch, it should move on to the HGWC loading. Close it immediately.
10. Check for virus

dows update.
11. Shut down computer.
12. Wait until your computer/laptop cools down.
13. Turn on computer again, and start CF, RUN AS ADMIN IF ON WIN7 OR VISTA.
14. Have fun.
If this didn't work, then idk.