Apache server behind router

hi everyone,
I’ve set up an apache server w/ php on my computer with windows xp home. It works fine and all when i access it through my computer or any of the computers within my home, but i want to make it so my friends and other people can access it from their computers also.
I’ve already forwarded port 8080 through my router…but i’m pretty newbish and i’m not sure what else to do.
Any ideas?

Thanks