MOL not grabbing usb printer second time around + fix

Hi all,

Just wanted to share a tip. I unplugged my usb printer after printing some
pics via mol, and the next day when I plugged the printer back in, mol didn't
see it. I guess whatever hook mol has works via the module loading, because if
I unplugged the printer, removed all its related modules, and plugged it back
it, mol grabbed it.

For my Epson R300, this meant 'rmmod usblp usb_storage'.

Hope this helps someone else!