Are you using .sty or .bst BibTeX styles ? I am not familiar with Mandriva's TeX installation, but under Debian I simply put harvard.sty (for example) in the working directory for the document, and insert a
\RequirePackage{harvard} in the master .cls file (or beginning of the document, if appropriate).
Then, at the beginning of the bibliography, the style is called:
Code:
%% The bibliography.
\addcontentsline{toc}{chapter}{Bibliography}
\bibliographystyle{my_agsm} % One of the Harvard styles
\bibliography{myreferences}
\end{document}
Hope this helps a bit.
Cheers,
mj