Hi Scott,
A few questions:
Where did this menu come from?
Has it worked before and stopped working?
Can you pinpoint exactly what works and doesn't (ie... is it a specific button, command, grouping, etc...), this would help locate the missing/erroneous information in the menu file.
For acad 2000 this is a .mns file that is being loaded, and for the later version a cui file,
to fix this issue for all versions it might be easier to delete the partial cui,
edit the mns file (please back this file up for your own benefit prior to editing)
once working, bring back into newer versions as a partial cui again.
P.S. The link didn't work for me, but that could have just been my internet connection