Currently, the custom map system means you must go out of the game and faff around online to get a map to work etc etc.
If enough people ask, Relic will at least have to listen to the community and hopefully add a patch that allows custom made maps to be downloaded and played within the game structure.
I used to play Blitzkrieg and that game downloaded maps as and when they were needed and therefore maps were never a problem.
The outcome to this was that many players created their own maps and this seriously improved the gameplay for serious players and well as increasing the longevity of the game.
I strongly believe we should ask Relic to look into this as it would seriously improve the game and allow the community to create, play and admire the game we all love. Furthermore, easing the use of custom maps within the game would add longevity to the game because there would be far more maps to choose from and learn; and these would provide more of a strategic challenge to all players, irrespective of their ability.
If you want Relic to facilitate this for the community, please add you name here!