New d2h HD DVR user.. Few doubts

Hi,I just recently got installed d2h HD DVR connection. Have few queries.1. How do I know that my STB is MPEG4 version?2. I am not getting surround sound (DD/DTS) in any channel. Not even in HD channels. I have connected the STB to my HT using SPDIF connection. I only get stereo in all channels. I have changed the audio output setting to "home cinema" in the menu3. Is there a way to change packages or add channels online? Or is it only through CC?4. The installation form the installation engineer brought had "on rental" marked instead of "outright purchase" even-though I paid 4490?5. Can some one guide on how to record a series. Right now I am able to record only one time.TIA.Regards,Sateesh.