Nothing bad. You're just doing extra work.
However, if you do the steps where you open up the file and make a list of where they belong, you can just take a peek at the other resources and see if all the files for that style are "black" or "custom."
Hm, does DDO list the bin a hair is in? You could open up the XML output file with WordPad and check if it does...
Yep!
Code:
<packages ptype="HairRecolour" isOrphan="false" isBroken="false" ptype2="2">
<filename>wind_hairsimplevictorian_black.package</filename>
<title>Hair Recolour</title>
<description />
<filesize>175029</filesize>
<lastmodified>2007-05-11T00:00:00.0000000-04:00</lastmodified>
<subfolder>\windkeeper\zmisc tsr</subfolder>
<polyCount>0</polyCount>
<md5hash>77532CD9CDE0F3A7D2F43D7CE68442D2</md5hash>
<catalogPlacement>Hair -> Black</catalogPlacement>
<tgis tgi_type="FC6EB1F7" tgi_group="1C050000" tgi_instance2="C44805F9" tgi_instance="FFDE3C3C" />
<tgis tgi_type="FC6EB1F7" tgi_group="1C050000" tgi_instance2="679880C6" tgi_instance="FFD81D8F" />
<tgis tgi_type="FC6EB1F7" tgi_group="1C050000" tgi_instance2="261656DA" tgi_instance="FF46BE94" />
<tgis tgi_type="FC6EB1F7" tgi_group="1C050000" tgi_instance2="53FA105C" tgi_instance="FFF9130A" />
</packages>
I think unbinned hair comes up as "Black," "Custom," or with a blank catalogPlacement tag.
BTW, I think Greg ruled that technical questions could be added to existing threads without fear of necromancy.