PEUGEOT 306 RADIO/CD PLAYER PROBLEM

Ive just swapped the original radio cassette player in my V reg 306 to
a
Peugeot 306 cd player - the iso connectors for the speaker and power
appear
to be the same and fit ok but the 3rd connector which I think will be
for
the steering wheel controls is totally different and wont fit.
The other problem I get is that the memory function does not work and I
have
to reset everything time I turn off ignition which is annoying to say
the
least.

Is there an adapter available that will work ? or could I wire it up to

work.

Ta

Pete