you should convert this so simply entering a steamID is sufficient.
steam users don't have to make a profile ID to get their pages to work on steam. so, this mod should be able to simply bring up the card based on the STEAM ID, and not the community profile ID (which most people have no idea or care to get).
http://steamcommunity.com/profiles/76561197974779190 = a valid steam community page.
gameme, formerly hlstatsX, is able to link people's profile pages just from pulling their steamID out of the game logs. shoudln't be difficult to change this mod to do the same (generate gamercard info based just on the actual steamID)
http://teamplayergaming.gameme.com/playerinfo/17799