[gentoo-user] GPRS connection through usb

[Simon]

Hi there,
  i've recently acquired a pda (htc tytn) and a good data plan.  Right
now, i can access the internet from my computer by setting up the
phone as a wifi ad-hoc station, but this takes so much battery, it's
not the optimal setup.

  What i would need is to use the usb cable to connect to the cell
modem.  But I'm a bit lost as to what to do...  the documents i found
on this don't seem to talk about the same things (there seems to be
many ways of doing this...?) and many are out of date...

  I was wondering if any of you could give me a general idea of what i
need (specially if you could clarify whats the best vocabulary to use
in google) or confirm what I found so far...

  From what i understand, I believe i will need some kind of kernel
module (device driver) which will turn the usb device into a
networking interface.  Then I think i would setup some kind of
connection normally (is it PPP? or something else?).  The cellphone
would also need to be setup to share its data connection to usb (but
this seems quite simple... the linux part is the problem).

Thanks for help and pointers!
Simon