I just work in one or the other to be honest. My computer runs better that way than having photoshop and poser open at the same time anyway ... But normally I work on a figure in default pose. Always save that and then start posing him/her and save it as a seperate file to make sure there are no problems .. Plus it is easier to grab the default figure most of the time. Then I export to obj and compress the heck out of everything ..