If you have Poser 8 (or Wardrobe Wizard) yopu may be able to convert my Drop It pants for the G2 males into something M4 can wear.
But I think JeanZ are made in a M4 version. The older versions I have of JeanZ all opens. Check Daz3D for JeanZ

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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.