You don't need to edit the fpz, just the 4 svgs, I was figuring on using the fpz in the perl script because it knows the names of all the svgs and thus could automatically edit them one after the other with lazy me just specifying the fpz file. While I use vi under cygwin, I expect that notepad (others use notepad++ I think) should do as well. All you need to do is search for px and delete them if they are in after a number (blank replace is likely a bad idea because it might delete text that you actually want!).
Peter Van Epp