Here's a couple of links that may help although they are for the DX6(i) I believe the radios are similar minus one channel on the DX5. I have a DX6i and it works great using the information I found on this forum.

http://www.rcuniverse.com/forum/m_73...tm.htm#7301841

http://www.rcuniverse.com/forum/m_85...tm.htm#8511991

Also check out http://www.desertarmor.com/ I know there's club members using both DX6(i) and DX5 radios.