Map Add-on

Hey. Is it possible to have add-ons for online maps?

Like say I had an online map for b.net with no skins/extra imported could I have a separate file people that could be download and then the game would be able to use the extras.

My map is going to be small with no extras and stuff to make is not lag and run fast but I want the option to download a second file from a web site that would let my map use special extras.

Maybe by using the trigger preload file and use the path of a hard drive instead of the mpq path?

I do not believe that is possible....

Darn

Make two versions, one is called "Mapname - Mini" and one "Mapname - Xtreme"

Then in the mini version make a note of telling people that there is another version with more stuff.