PhilC has made a CD that covers the ins and outs of clothesmaking for Poser. From the actual modeling and to fitting it to a character.

It's a highly recommended buy :)
(and Phil ships FAST!)

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.