Much thanks, just a follow-up question and an update.
First, a question, in your MY::postamble() you essentially overwrite the original install rule--that's clear. But if you had written a MY::install() in a similar fashion, I noticed that, that will eliminate the entire section of the makefile all of the way down to where it says # --- MakeMaker force section:! Your technique doesn't?
Update: I tried a yet another approach (hinted at above), i.e. I added a MY::install() wherein I added another action to the install rule, a myinstall. Then under myinstall I added the obvious $(MKPATH) and $(CP)s. This is where I noticed that you had to be careful in order to not loose great hunks of the makefile! The only saving grace of this approach is that it worked.
Clearly your approach is a good deal more concise and a great deal shorter! I'd suggest you stop waiting for those circular tuits and head on out to tutorial city, MakeMaker badly needs a cookbook. For that matter, why not issue a call for recipes?
–hsm
"Never try to teach a pig to sing…it wastes your time and it annoys the pig."