It looks like SKY does not officially let there customers use 3 party modems on there network so the settings and published.

You should be able to get the info by login into to SKY router.

All I can find are the settings for SKY UK DSL

asic Settings
Does your Internet connection require a login? : Yes
Encapsulation : PPPoA
Login & Password - as extracted from your Sky Router. Just in case they don't work, navigate to this site (use Copy & Paste from the Sky router for the correct MAC Address & Password, then copy & paste the results in to a Notepad/Text file so as to reduce any mistakes
Internet IP Address : Get Dynamically from ISP

ADSL Settings
Multiplexing Method : VC-Based
VPI / VCI : 0 / 38
DSL Mode : Auto
Transfer Mode : ATM

WAN Setup
MTU Size(in bytes) : 1458 or 1400 (the correct size should be 1500 but the DGND3700 does not allow this figure to be used, if 1458 causes problems, then try 1400)