Hi I have a 6000HD and can tell you the following:
1) You dont need to update via USB . You can use the Upgrade by Network option and take first option and press red button to download. Make sure box is connected to your router otherwise it wont download. Also make sure you dont switch box off while its downloading. When download completes the box will reboot itself. You can then check in System Information for latest firmware.
2) To open channels you need to have IKS active and connected to your router.
3) Functions like Youtube etc dont need IKS active.
4) As far as i know IKS does not open channels on 28.2 east.

Regards