There are several options: 1- you can get a utility like The Tailor; this will add the morphs to the clothing, but the end result might not always be 100%. Example: your new clothing shirt might have nipples and a depression between the breasts, when fabric would just go seamlessly from one cup to the other. Or might have extra crunches and folds. Advantages are that you can have lots of new morphs in a single clothing item, creating the morphs one by one as in the character (i.e. Barbarian, Muscular, etc) so the clothes could be a lot more flexible. 2- you can use Clothes Converter. You will have more control over the final morph, but you will take a LOT longer to produce something that works correctly; results are touch and go too. I've had about 50% usable stuff; and it takes AGES to make something complicated fit properly. The good thing about this is that you get control over vertex by vertex, if you wanted. And you could use the original item's CR2 for rigging. Bad news is that you might find yourself needing to have one new item for each character body you have. 3- you can use Wardrobe Wizard, which should morph the clothes as necessary. Downside is similar to CC: you might need a new clothing item for each character. But to me, it seems to produce better results than Clothes Converter.

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