Avaya 56xx 46xx SIP phone functions

Hi,

we have a couple of Avaya 4621 phones, the ones with the big display and the WML browser (they’re coooool).
These toys have Push functionality and programmable buttons…

The browser part we’ve gotton to work, but I want toget the rest up and running: message buttons, functions, …

Anyone already doing this of done it successfully?
I’m willing to help and test, but I’m not a progger or scripter… so I’ll need help with it…

Let me know if anyone has these phones…
I’m willing to exchange idea’s, stuff, scripts, conf’s, …
Thanks in advance!