If you are struggling to find updates, hotfixes, patches and other resources for older Autodesk software, try this page:
ftp://ftp.autodesk.com/ProdSupp/
There is a lot in here:
This is one of the most prolific folders, containing files from about 1998 to 2005:
ftp://ftp.autodesk.com/ProdSupp/downloads/
And what is IFC doing in here?
Pretty cool that Autodesk were supporting IFC 1.5 in 1998:
via
� Autodesks FTP Product Support Download Page Tech Solutions