Creative USB BroadBand Blaster under Linux

Hi, i´ve recently purchased the modem mentioned above, and as usual, the vendor only provided me with the windows driver. So I googled for a linux driver and found a driver called eciadsl (http://eciadsl.flashtux.org/) meant for modems with GlobeSpan chipsets. It works fine except for one thing, there´s no support for PPPoE, the protocol used by my ISP. The eciadsl documentation says that PPPoE users have use a standard PPPoE client configured to use the modem through tap0. My client is configured as I used to have another modem and it worked fine. I haven´t managed to bind my usb modem to the tap0 device, and I have no idea how to do it, could someone give me hand? I´m running conectiva 10, thanks in advance!