First off you may want to find a program that plays well with the OBJ format. It will make things a lot easier for you. Max3.0 may or may not, it's pretty old. Sketchup is primarily for architecture design so you may find it difficult to model clothing in it. Not sure, haven't looked at it to closely. You may want to check out programs such as Wings3D, Anim8tor, or MilkShape (run a google on the names and the links will popup) they are all free software and a number of people use them for working with Poser as they save directly to the OBJ format.

I don't fear God anymore. Anything he/she can do to me now is only adding insult to injury!