Michael, I would not recommend RealBook software. Like you I did some research and not only does it look illegal there are also a lot of activation problems with it, if in fact you can activate it at all!

A much better and legal way to do this is to buy BiaB, a legal fakebook like one of these http://www.amazon.com/s/?ie=UTF8&key...sl_6szbqc16ue_b
and the matching Fake Disk, if there is one, from Norton’s music http://www.nortonmusic.com/contents.html#fake

It is legal as Norton’s Fake Disks have the chords only, however the chords are in the identical key as the fake book. Just load the song in BiaB and play along. You can not copyright a chord structure so all chord progressions are legal to copy and distribute. It’s the lead lines that can be copyrighted.

If there is no Fake Disk just input the chords from the fake book and go from there.

I hope this helps.

I want my last spoken words to be "I hid a million dollars under the........................"

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware