DVB EPG - (Radio Channel Setup?)

[KevinM]

TV-Server Version: 15353
MediaPortal Version: 15346
MediaPortal Skin: Blue Two
Windows Version: XP Home SP2
CPU Type: Intel Pentium 4 3GHz
HDD: 250GB Western Digital (WDC2500KS-22MJB0)
Memory: 768MB
Motherboard: DHC 2000
Motherboard Chipset: Intel i915P/i915G rev. B1 / Intel 82801FB (ICH6) rev. 03
Motherboard Bios: Phoenix Technologies, LTD 6.00 PG
Video Card: ATI Radeon X1300
Video Card Driver: Catalyst 07.3 (Control Centre 2007.0320.2241.38712)
Sound Card: Realtek High Definition Audio
Sound Card AC3:
Sound Card Driver: 5.10.0.5028
1. TV Card: Pinnacle PCTV Dual DVB-T Pro PCI
1. TV Card Type: DVB-T
1. TV Card Driver: Pinnacle Systems 3.2.4.0
2. TV Card: Technotrend S-1500
2. TV Card Type: DVB-S
2. TV Card Driver: BDA 1073
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec: Cyberlink Video/SP Decoder (PDVD7)
MPEG2 Audio Codec: Cyberlink Audio Decoder (PDVD7)
Satelite/CableTV Provider:
HTPC Case: Elonex Artisan LX
Cooling:
Power Supply:
Remote: HP Media Center p/n 5187-4401 (MCE Equivalent)
TV: JVC AV32T25EK
TV - HTPC Connection: S-Video

When you use the TV Set-up | DVB Guide option, MP asks you which Radio channels you want to use to update the TV guide - is this normal ?

I notice that two of the options are called :-

EPG Background Audio
IEPG Data 1

Are these significant? - and does this option do anything when you are using the TV Server ?