Can you add new symbols to MapSource Library?

All,

I've searched the FAQs and forum posts and I think I know the answer....but...

is it possible to add additional waypoint symbols to MapSource?

From what I've read, POI symbols can be added to via POI loader.

What if I just want to add the icon?

Apologies if this has been answered beofre..I just couldn't find it.

Cheers!!

Jeeperaf