If you go into your c.p-> Registration Settings you can there insert 4 extra "Custom Registration Fields".
I have used 3 off them like this:
Custom Registration Field # 1:Male or Female?
Custom Registration Field # 2:Favourite Game?
Custom Registration Field # 3:Favourite Music?
Now when i use the mood selector hack 2.5a i can chose the mood.gif i want in my profile and the image shows correctly besides the drop down box with the different mood options.
But in my posts the link to the mood image i have selected is not working because it is mix'ed with my Custom Registration Field # 2: where i have Serious Sam.
So the url to my mood.gif is like this "http://mytestboard.com/ubb/moods/mood.gifSeriousSam".
Now when i return to my profile the mood i have selected is back to default and the complete url to the mood.gif i selected last time is now inserted into the box where i answer my "Custom Registration Field # 2:".