Sorry for delay... Here are resistor values, finally (I hope I got them right):

cmd byte    R       R1      R2   button



3a   58    6477    5635    7372  back/front

af  175   48125   43233   53811  middle

9a  154   33545   30430   37053  front/back

2a   42    4338    3616    5101  att

5a   90   12000   10807   13283  back track

48   72    8656    7683    9695  fwd track

16   22    2077    1473    2714  source

84  132   23610   21488   25949  vol back

6e  110   16690   15152   18360  vol fwd

First two columns are command bytes (in hex and decimal), then ideal value of the resistor (in ohms), then minimal and maximal value that should still be recognised by 2.0 kernel (it is wise, of course, to use much smaller tolerances; 1.03 kernel is about three times more strict).