Can someone please tell me what maps I need to install to play most of the coops and deathmatches on line. i can play several but most tell me that the host is using a newer version of the map and wont let me play. I also get cannot find map.

If we are truly talking about the orginial Ghost Recon and not any variant of GRAW, assuming you are connecting to the games through the UBI game service, then those servers are probably running user-modified maps done through the IGOR application.

The only hope you have of finding the correct map is to find the servers website to see if they are hosting the altered map.

This assumes that you are patched up corrected for OGR and running the same version of the game the server is.

If you are, and this is OGR, it is probably not worth the effort to try and find these maps for a specific MP session, but hey to each their own.