Allowing players to select multiple targets

I'm writing spell casting macros, and I'm after a way of allowing my players to select multiple targets (either other party character tokens for spells like "Bless", or monsters to target with area effect spells) without giving them control of every token on the field of play.  Obviously, @{Target|Target1|Token_id}, @{Target|Token2|Token_id), ... @{Target|TokenX|Token_id} etc. can select a fixed number of targets, but does not allow any flexibility, or a drag for area selection.  Does anyone know a way of doing this without creating an API Script?

Unfortunately there's no way to do this without using an API script.

GiGs said: Unfortunately there's no way to do this without using an API script. Back to Plan A then...  API Script it will be...  I'll try it myself, unless anyone has one handy.  I'll check on the API Forum