Changing the size of a player

Hi, i posted here because id assume it would be done with lua, not sure if its the correct section but anyway, i was thinking the other day that a good way to make spacebuild maps bigger, would be to make the players much smaller. I doubt this can be done being that if it could, someone would have made it but id thought i might as well ask. Or if it cant be done in lua, could a .dll module do it, or would it require a total rework of the source engine? Thanks.