Switching to BT Broadband

For reasons I'm still grappling with, I'm in the process of switching to BT broadband. Mmm. More expensive, and I dont know what kind of service I'll get. However.

I was testing the software installation last night, and in a mischevous mood, stuck the BT CD-Rom into the mac. Well. Kudos to BT - their software actually installed, etc. So - nice one. However, can I suggest that it gets a little more testing as the following error message will attest:


I mean, Vista, I can understand this being an issue with Vista..