Q&A UT3Ed

I figure it can't hurt to have a place to just ask random questions instead of having to make a new thread every time one pops up, and anyone who's tried out the new editor can help in answering them.

And to start us off, does anyone know if it's better (performance or filesize) to have a single terrain with a lot of textures, or several smaller ones with less textures in each?

EDIT: Oh, and how do I compile stuff in UT3? For 2k4 I just used Umake which kinda spoiled me there... >.>; Is there something like that for UT3, or... what?