If Houston is getting involved in a three way with the Lakers its because they would take Pau Gasol and play him at center with Scola as the PF. Bynum is being saved for the Howard trade that the Lakers will be attempting.
As for who would end up in New Orleans from Houston, my guess is Kyle Lowry and Kevin Martin would be a start and any one or two of Jordan Hill, Patrick Patterson or Marcus Morris would probably as go well. Houston has Dragic that could take over the PG duties and they would still have money to sign a SG like Josh Howard or Marcus Thornton.