I advise installing the CnCNet online play installer for RA2/YR.Unpack in the game folder, run 'patch_main.bat', let it finish, and then delete the files you extracted.) Nyerguds' main.mix cleanup for TFD/TUC (Not really needed, but cleans up about a gigabyte of unnecessary files in the RA1 folder.
Note that this patch fixes two quite common and completely fatal game crashes ( top-of-map reconnaissance crash, stealth crash), so installing it is strongly advised.
