I was able today to install Finale Notepad 2004 successfully onto my Linux box (running MEPIS - a Debian distribution). I am using Crossover version 4.1-standard as the windows emulator (Crosssover is a commercial version of the Open Source windows emulator WINE). This particular machine does not have Windows on it at all. The fonts and notations are correct and the songs play correctly (using the OSS sound drivers ).
Previously I had installed the versions of Notepad and Crossover onto a Red Hat 9 system and while the notation was correct , the songs would not play at all (due to some MIDI error).
Interestingly , I also have Finale Notepad Plus 2005 and it will not even install into this MEPIS-Linux environment (at least not yet). I have no version of the full Finale to test.
Cheers and good luck!
Ken