Re: multi-instrument parts

[Kieren MacMillan]

p.s. It would help immensely if I could at least say

   \tag #'part { \transpose c d }
   c4 d e f

and then use the tag filter to leave the transposition out of the C-score. 
However, this doesn't seem to work — any ideas how I can accomplish such a 
thing (or very similar)?

Thanks,
Kieren.