Browse to the folder you created earlier, and run 'setup.exe'.
When you run setup.exe, it might only give you the options to 'Play' or 'Uninstall'.
If this is the case, go back to step 1, to trick it into thinking you want to install a new copy (don't actually install it!).
Click on 'Install', and go through the options, *deselecting* 'Install icons to desktop/start menu', and 'Install Gamespy'.
The game will say it is ready to install. Click next. Immediately, it will give you quite a few weird errors like '~WMP.TMP'.
when i do this and hit the next button i dont get the errors.. i asks me for vietcong cd1 ???
what to do now ?