The basic steps in Poser 5 (or Pro Pack) are: 1) Import your clothing mesh into Poser. 2) Enter the Setup Room. Poser will warn you about the possibility of losing morphs and other silliness, but you're working with a static, morphless mesh at the moment, so that's of no concern right now. 3. You'll need to give the clothing the same bone structure as the figure to which it'll conform, so open the Library and load that figure. When you're in the Setup Room, it'll only load the figure's bones. 4. You must now cut the mesh into corresponding body parts (forearms, shoulders, hip, abdomen, etc.). This is done with the Grouping Tool. The tool has an autogroup function that can do much of the work for you, but it's not completely accurate, and you'll need to manually adjust the groups for best results. 5. After you've finished grouping everything, use the Grouping Tool's weld function on each body part to eliminate any breaks in the mesh. 6. Exit the Setup Room and return to the Pose Room. Save your new clothing figure to the Library and try it out (posing, conforming, etc.). Proper grouping is more of an art than a science, and you'll probably need to make many adjustments to the figure's joint parameters and the like before you're satified with the results, so don't expect perfection on the first try.