What Waves versions to work with N2 & C4.02?

Hi all.
A friend just took advantage of the current Waves offer of some very cheap plugins.
She needs these to work in both Nuendo 2 and Cubase 4.02, running OSX Tiger.
Waves support are being hopeless, and plugs seem to work in N2 bit not C4 as version 5.

Anyone please have any idea what versions she needs to use?