Well, I copied all the SP Pak's, and named them:

spmap1.pk3
spmap2.pk3

Copied them to the MP Demo and it runs just like the SP.

It takes over the menu's of the MP.

Would it be possible to copy over only the pak files that store all the maps, scripts, sounds, and animations from the SP to the MP and be able to run the SP map/scripts on a server and have people join - that is keep the MP menu's etc?

Thanks.

Im trying that myself.... But it wont even start the server.... hmmmmmm but looks promising