Addisadden,
This hasn't worked for me in Windows XP.
To begin with, the [midi_instdrum32 drum0/1/2/etc] object-boxes were broken. I checked inside the tools folder and "corrected" the names in the patch to midi_instdrumsynth32..., which made empty Graph-on-Parent windows appear. Then, I went into those and found other object-boxes broken in the sub-patches, but the names did match stuff in 'tools'. So, I shut down Pd, re-started the patch again, and everything was back to the way it first was, except for the names I'd "corrected" in the main window, which were again in broken object-boxes.
There's undoubtedly a strong element of limited Pd-knowledge on my part here, so I wonder whether others have managed to get it going on Windows.
(yes, I did put the 'tools' folder into the Pd path, to begin with~:o)
Strange brew, but a lovely patch nonetheless, from what I'd heard via your other post.
So, thanks anyway, and keep well ~ Shankar