Comcast Idiocy, DNS Servers and Networking

[Lord Sauron]

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My latest problem:

Comcast (my ISP - curse them forever and their anti-server AUA) does not 
like Unix.  My brother's OS X iBook has to use special DNS servers to 
get it to use a speedier Internet service (which we pay darn good money 
for - too much money!)

After noticing that Linux was noticeably slower with networking tasks 
than Windows, I found that Linux is also afflicted with the same 
problem as OS X.  Normal configuration via the DHCP (Comcast's 
servers - curse them yet again!) gives the wrong DNS servers.  I do 
know what the right ones are: 4.2.2.1 and 4.2.2.2.

Right now I have to set my network to these DNS servers every time I 
boot my computer - total rubbish and annoyance.  Thank you Comcast.

I would really like to know if there's a was I can still auto-configure 
via the DHCP to get a valid dynamic IP address and a valid gateway, yet 
still override the DNS servers to change to the faster ones.  If 
there's a simple solution, I'd love to hear it if anyone knows the way.

Thanks for your time!
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