Many are the ways. The folks I talk to like a workflow that is, basically; Zero the new figure and the clothing you are fitting. DON'T conform. Use scale dials and magnets to get the best fit you can. Now export the clothing mesh. Get a "stripped" copy of the new figure's cr2 and edit the object call so it asks for your new clothing mesh instead of the figure mesh. (This cr2 is either a copy of the figure with all the morphs removed as well as, usually, fingers and head; or a similar "base cr2" distributed with the figure, or an item of clothing for that figure that includes the same body parts.) Open this new character, conform it, then tweak the joints using the joint parameter pallet until it works nicely. Depending on the clothing, this step may not be needed at all. But of course, you will need to fix the materials anyhow, and do some tidying up of names and anything else you missed in the previous steps. You can also use magnets to work up some body shaping morphs at this stage, too. Clear as mud?