I used your installer -- or saw it used -- on 2 Titanium and 1 G3 iBook. All three run Jaguar. Everything went smooth, although OSXPM could not cleanly remove older versions of pd-extra (on all 3) and pd-base on the iBook.
Nevertheless, Pd works very well, with zexy and friends.
There is a problem that's not related to the installer but rather the externals : Pd cannot find help-*.pd files for some packages.
For the impatient, I recommand the 3 steps installation proposed :
If you have special libraries or externals, be sure to put them in .pdrc before complaining they're not found ! ;o)
hellekin