Uhm.. you CAN start a filename with a Space. I use it to sort my own stuff (also commercial, but not on a folder level though. I just like to have the main thing on top - say a MOR pose, and then the MAT poses below that)

Just name the thing in Poser starting with a space. Or use something like Windows Commander (Now called Total Commander) - that accepts filenames starting with a blank as well

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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.