Moving from Frankfurt main airport to Frankfurt/Hahn airport

I will be passing by Frankfurt and I have to go from Frankfurt main airport to Frankfurt/Hahn airport, could somebody tell me how far are them from each other?, What’s the best way to move from one to other?, is there any transfer bus/train?, How much it cost?, how far or how much time does it take the trip?.
Any other useful advice will be welcome.
Thanks in advance.

There is a bus that goes between the two airports. It costs 15 EUR IIRC and leaves from outside Terminal 1. Make sure you have at least 5 hours between arrival of your plane at FRA and departure of your plane at HHN.

http://omnibusse.bohr.de/en/fahrplan.php?akt_linie=2&zuk_linie=0

[ Edit: Edited on 16-Apr-2009, at 13:01 by t_maia ]