Unfortunately Nokia SU-8W hardly ever runs out of the box, although might have with Belle FP2 devices. You might like to start with this resource:
http://talk.maemo.org/showthread.php?t=38372

Don't know whether bt hid scripts still exist in extras-level repos as referred to in this thread:
https://answers.microsoft.com/en-us/...a-0ad42668e59d

Keep us posted how you get on as might get around to dusting off N900 + SU-8W