First.... unfold it to ONE CHORUS if you have not done so already.
That allows you to INSERT bars where you want the bridge to be. Insert the bars, add the chords of the bridge, and then..... save the song and re-open it in Real Band.
In real band..... you will see the exact steel guitar track number it used.... simply click on an unused track and select Create Real track using that same number for the steel guitar track..... feel free to do that as many times as you need.
I never use the intro generator. I always input the chords I want and specify exactly what I do want. That's how you create dissonant sounding chords.... you can also tell it to play a different bass rather than the root like it wants to do. for example A/F# would give you the A major chord with the F# being played by the bass.
I too take the tracks out of RB and into Sonar where I mix. I have used 5 guitar tracks in the same style to create one final guitar solo.... Listen to the solo in The Best Christmas..... 5 tracks and envelopes to create what sounds like one smoking hot solo.
http://soundclick.com/share.cfm?id=11971116 solo starts @ 1:12
hope this helps you a bit....