There's another way as well, but for
Ultima IV only.
Try
ux4: Ultima IV Recreated. You can get it from this site on SourceForge (completely free, of course):
http://xu4.sourceforge.net/
To use it, just click the "Download" link at the top of that page. Then, on the "ux4 Download" page, do NOT get any of the files under "ux4 Releases", unless you want an older version for some reason. Instead, for Windows, get the one marked as such under "ux4 Daily Snapshot Builds". It's the top-most download link very near the top-left of the page. If you're using Mac OS X, then just get the one just under the Windows version marked as for use with Mac OS X.
It's an installer .EXE. But do NOT install it to its default installation directory. Instead install it to the game folder whereever the
Ultima IV game has been installed on your computer. In my case, I had to install it to:
'
C:\Program Files (x86)\GOG.com\Ultima 4\ '
Now you can discard the installer and just run the '
ux4.exe' to play the game enhanced. Configure it how you'd like in the in-game menu. There's the missing music, and like five different graphical modes, several filtering modes, and other extra features hehehe
That's all! Enjoy the game! hehehe