Those extra downloads ...

Recently I had to reinstall openSUSE 10.2 and have forgotten the three(?)
extra packages it was advised should be downloaded, although I do remember
one of them was required to play video clips in a propriety format.

Sorry to be so vague about this, but if anyone can figure out what I mean,
can they give my geriatric mind a gentle nudge, please. A web reference
would be suitable?

Regards from New Zealand on a very pleasant Tuesday evening.
--
David Love
.