Adding a new font to FOP. could not find the main class. the program will be released

I am trying to add a new Font to FOP.

I am starting to create a metric font file by running this:

java org.apache.fop.fonts.apps.TTFReader C: \ WINNT \ Fonts \ msgothic.ttf msgothic.xml

But I keep getting the same error: could not find the main class: org.apache.fop.fonts.apps.TTFReader. the program will exit.

I assume I should add fop.apps.TTFReader to my Java path, but I cannot figure out how to do this.

Thanks in advance for your help,