Retrival of email login data

Hi guys - I wonder if you could help with a friends problem?

He was using Windows XP and Outlook Express to access his emails.
Then tragedy struck and his motherboard failed BIG time!
I supplied a new motherboard and as he was feeling flush a new hard drive (the old PATA one wouldnt fit his new SATA based mobo) and Windows 7.

Now the sad bit ... he has forgotten the login details for his emails. We know the old hard drive is ok and can access all the files from it, but cannot boot it. Can we lift the Outlook Express login details from that drive and put it on the Windows Live mail that he has installed on his new drive?

I can connect the old drive via a USB caddy, so copying the file is an option, but cannot boot the machine from it as the systems are too different.

I dont know why, but his email supplier wont give him any help with his password, even though he can answer every question they ask.


Thanks in advance.

I really appreciate kudos points as a payment for solving issues :o)