Need help with 1st HTPC

This old man is trying to build his 1st HTPC.
Somewhat technologically handicapped.
Have some hardware and software already.
Need some (maybe a lot of) help.
Not really into HDTV yet, maybe latter on.
Just want to put together a system that works.

Which of the following parts should I use ?
Anything else I may need?

Hardware:

Asus A8ne socket 939 MB
3800X2 cpu
4 GB Kingston HyperX DDR pc3200

Gigabyte MA69GMS2 socket AM2 MB
6200 IGP
5000BE cpu
2400BE cpu
2 GB OCZ Reaper DDR2 pc6400
2 GB OCZ Platium DDR2 pc6400

EVGA 8600GT 512 MB Video card
EVGA 7600GT 256 MB Video card

Hauppaugel HVR1600 TV card
Twinhan VisonPlus VP1020a satellite turner card

Samsung 160 GB sata drive
Samsung 250 GB sata drive
Samsung 320 GB sata drive
WD 640 GB sataII drive

Enermax Liberty 400 watt power supply
PC&P Silencer 610 watt power supply
Antec Earthwatt 500 watt power supply

COOLER MASTER RC-690 case
COOLER MASTER Centurion 5 case

MS MCE remote

Software:

Winxp pro
winxp mc
Vista Utimate
MythUbuntu

Mytheater 3.38
BTV 4.8

Dish Network Sub.

Thanks

Thanks for the response, 007

I was hoping to use both the VP1020a and the HVR1600.
Have both of them on hand.
Use the HVR1600 for Dish Network and OTA, and use the VP1020a for FTA satellites.

Any reason I cannot use both at the same time?