Well, just got the ADSL modem kit delivered to my home today. I have installed it (drivers, PPOE client s/w and all). I don't want the people from BSNL to come to my home to install and charge 250 bucks just for doing what I just did. Installation is very easy.
My questions are:

I have taken the free ongoing trial offer. Should they charge for installation at premises? According to the conditions they are not supposed to do so.

Is any special settings need to be done in the network connections, like primary IP address, DNS mask, secondary address, subnet mask, etc? Also is it required to change internet settings (LAN settings, in particular)?

Where to get the username and password, and do I need to specify any number which the ADSL modem should dial?