Hah! Of course it is. I thought I had files sorted by name (I didn't) and when I didn't see a "Spellforce 2" right next to "Spellforce", I didn't look any further. That's one question down, now I just need to fix this license key issue.
I'm not sure why it would ask for a serial when booting from your son's account. Is it a limited account previleges wise ?
In any case, If indeed there's a serial around somewhere it's most likely stored in the registry. Maybe you could try to look around a bit for it there?
It's an admin account, just as mine is.
A-ha! Again, I was just looking in the wrong place. I had checked the registry already, but I didn't bother looking in HKEY_CURRENT_USER (should have been the first place I looked). Thanks for the help. Here, have a cookie!