<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by Faye:
I'm no expert, but it appears you can combine all of your different airline miles into the one you will be using by transferring them to Hilton and or starwood and then transfer them to your airline.</font>
That is possible (at least to Hilton), but not advisable as you will lose most of your miles in the conversion.
Keep up with FlyerTalk, and try to post specific questions in each airline's forum.
Good luck.