Actually, setting up BT dun client is a bit simpler. Install the package bluetooth-dun-client from my repository, which installs all the files described in my post. You are left with a need to edit two files:

/etc/bluetootf/rfcomm.conf : Change the BT address in this file to the address of your phone.

/etc/ppp/chat/gprs.chat : change internet.pelephone,net.il to the name of the APN your provider uses. (This assumes using GPRS/UMTS. If you use another connection, such as CDMA, the file needs more editing).

After that you should have a connection called orange in your connection manager which connects to the internet through your phone.