[HELP] Broadvoice and asterisk

I am looking around trying to figure out what I am doing I have looked on the broadvoice site they have some information there i have took in to mind what I dont get is the sip.conf and extensions.conf files should I delete everything in them and just add the boradvoice information or add the broad voice information to the files. In the case I have to add the information where should I be putting it thanks in advance.

voip-info.org/wiki/view/Asterisk … Broadvoice

voip-info.org/wiki/view/Aste … +Telephony