The way I mostly do it is run the JCM that you want to match to 1.00, them make a morph in the clothing that matces it, either with magnets or by exporting the figure and matching in your modeling program. I then make a temporary morph in the clothing, save the CR2 and use CR2Editor to move the morphs information to the JCM, you need to copy and paste the Deltas, numDeltas and indexes lines, 3 lines for each morph. I also convert Vickie's Collar Bend into an up and a down version, with limits set so there is no overlap, and make two morphs for this one (run it to -1.00 to make the down one), as you will find it is almost impossable to get one to work properly in the full range. Oh do all this using a "zeroed" figure, of course.