Well, opening a browser on a low end computer you don't care about takes more than a minute loading up everything and downloading...
Can't you upload them on RTB in some special way? I'm not versed in the special things of RTB's Add-On system, but I thought... something like that. Probably not right for this, but maybe in the future. Maybe RTB could have a comprehensive GUI downloader where it is uploaded on their servers and pre-approved for uses more than the regular GUI downloader allows... That way, stream-lined.