Any idea what the plugin is supposed to do?
If its just video of some kind, just install the K-lite codec pack
Install the full pack from
Free-Codecs.com : Download K-Lite Codec Pack 8.7.0 FULL, K-Lite Codec Pack 8.7.0 STANDARD, K-Lite Codec Pack 8.7.0 BASIC : K-Lite Codec Pack is a collection of codecs and related tools
That should cover most bases. Make sure you have the Adobe Reader (or other PDF reader installed - eg Foxit)
However there are a number of dedicated chemical plugins
EG
Chembase search
Chembase Mozilla Search Plugin - Chembase - Chemical Compounds Database Chemdraw for Connect
ChemDraw Plug-ins Page CS Chemdraw
PerkinElmer Informatics Support Home – Desktop Support – Documentation – ChemDraw
There are others as well but its a long long time since I had to use them and I'm not sure just what else is out there
If you can advice more on the publisher of the disks I may be able to track it down