ClgShaft: Sorry for the dead air, I've been on the road for work.
The number of digits shouldn't have material impact on the hack. After multiple posts, I'm not 100% sure I understand where you are. I think you've set up your HTPC as a US system, and are looking to add Canadian guide data.
The current hack assumes the opposite, that you've set up a Canadian system and want to add US guide data. In order to accomplish this, the scheduled task temporarily changes the registry to make your computer appear to be in the US, downloads the US guide, then changes the registry back to Canada.
If you simply insert a canadian guide ID, the download will fail because the registry is set to US during that update.
You should be able to modify the scheduled task to change the registry to Canada, update the guide with your 8-digit code, then change the registry back to US.