I think the bt are just beat files as you have them with the drums and loops also
Loop124bpm Conga 8ths 2 bars low.bt6
BLUESROCK128^_60_STYLE.bt1
The usertracks just use the SGU for the bar/chord info.
These are the files installed with a realtracks 245, I wasn't sure what the stx was
but as Noel pointed out the stx was just an xtra styles file.
RealTracks Set 245
RBEGTR05.ST2
RBEGTR06.ST2
RElGt283.ST2
RElGt284.ST2
RElGt285.ST2
RBEGTR05.XT2
RBEGTR06.XT2
RElGt283.XT2
RElGt284.XT2
RElGt285.XT2
so i could be wrong but I thought somewhere in these files would have all the
bar/chord info of each RT wav/wma
Guitar_ Baritone Electric_ Rhythm PopCountryBrent Ev 120
bgt091.wav - bgt110.wav
Guitar_ Baritone Electric_ Soloist CountryWorkinBrent Ev16 100
bgt111.wav - bgt140.wav
Guitar_ Electric_ Rhythm CountryBluesRock Ev 110
eg7951.wav - eg7980.wav
Guitar_ Electric_ Rhythm CountryBluesRockHigh Ev 110
eg7981.wav - eg8010.wav
Guitar_ Electric_ Soloist CountryBluesRock Ev 110
eg8011.wav - eg8045.wav
As Wendy said when Brent is recording these he would have the chord chart he is playing over same as userttracks template we record to, just like if you open these SGU files
Good Ear in the RealTrack folder
it will give you the chords as it's playing.
This way also you can highlight the bars/chords you want and drag them straight into the DAW.