Migrating Outlook Express to Outlook

Outlook Express appears to have three types of information that require
transferring to a new system:

1) Address Book
2) Accounts
3) Message Store

If the destination was Outlook running under Windows 7 on a new computer,
what would be the right method to move over these three types of data?

For Address Book:

1a) You can do Tools | Address Book and then select export to file type WAB

1b) You can do File | Export from the main menu and select Address Book as
the object of export.

I'm not sure if this creates the same type of data file or not?

For Accounts: go to Tools | Accounts and then select Mail tab. From
there export to type IAF.

For Message Sto go to File | Export and select Messages. I have no
idea what type of data format that creates.

Are these the only export files we need to create and move to the new
computer? Will all of these files import cleanly into corresponding Import
functions in Outlook? Should we care about whether it is Outlook 2003 or
2007 or 2010?

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W