Here is the info on the time signature change as played by Tony Rice (and some others).
Jerusalem Ridge for guitar in Am, 4/4 time (as played by Tony Rice)
The timing change occurs in 3/2 time described below:
2nd ending on part B consists of 1 bar as follows in 3/2 time,
16th Notes "E,F,C,G#", half note "A", quarter note rest, eighth notes "G,A"
2nd bar of Tag is also in 3/2 time consists of:
tied eighth and quarter note "hammer D to E", eighth note G, 16th notes "E,D,C,D", 16th notes "E,C,D,C"
I haven't yet put the arrangement into BB, but the two bars of 3/2 I suspect will be tricky (Peter?)
Richard