iOS 5: Two Dev Accounts?

Hi,
Sorry, I think I posted a similar thread earlier but this time the question is slightly different.

I have had my UDID registered by my friend who is a dev, and I'll admit, to try iOS 5. (I haven't yet installed it) But now I'm going to buy a dev account, so I can test some apps I've been building.

My question is: would iOS 5 still work if it was registered under both accounts? I know most people would just say leave it on your friends account and be done with it, but I'd like to have everything under one place.

I see no reason why it shouldn't work, but can anyone just confirm this?