Hey, if you want asm, go all the way and skip BASIC. C'mon! be a man!

There's some pointers (I believe even in the "basic" loader) which you can set, they can also be set during wbass2 execution using "set" function. Gonna have to check how that works exactly, should not be a problem. . . wait.... processing..found it:
#4038, source start address (editor)
#4040, source max end addres (editor)
Just give a "new" statement and ye've got new space.
Dunno if it helps, but hell. You want asm, go figure it out
(neh, sorry I'll do better next time)
An english manual eh.. uhm. no can do for now. I'm a wb2 hardcore user myself, so I could answer your questions. But, as of today I'm on a 2 weeks holiday probation, so I'm gonna be of this board for some time (hurray!)
cheers ya'll