Hrm, so it looks like it cancelled and restored the original partition info, and the data is all still there - I guess since I did it before it went past the 40GB point. Yay for not having to spend another three hours faffing.
Heh, so this is why I've got a 32GB pendrive with Windows recovery on.
If I'm reading my ramblings correctly, it wasn't any help and there's no reason not to overwrite it ... so why do I feel like the day after I do, Windows will suddenly break on me... :'S