>>2529316well, I hid it all in 4 clicks, shouldn't be a problem to do it repeatedly--whenever you upload a model:
1. Go to edit mode - Tab.
2. Material tab.
3. Select all materials tied to certain cloth type, on Jirou example is
[DopeOutfit-Shirt - select]
[DopeOutfit-Spats - select]
...
[DopeOutfit-Sneakers2 - select]
4. Press P - separate by selection, here, one clothing alt is separated and can now be hidden, moved, whatever.
hope this helps.