Thanks Guys, but i think i might have lead you up the garden path a bit, now that i re read my initial post.
What I meant to say was this....I would take the desired amount of images at different exposures, align/combine/stack etc in Image Plus, then when i had the two final images i would take then to PS2 and finish them off, so to speak.
Dose that make more sense, gee, I'm confusing myself here.
Leon