Do you want to use Microsoft Office Outlook on the new machine or do you
just want to move from Outlook Express to Outlook Express
In the first case use the Export in Outlook Express and export it to a
pst-file. In Microsoft Office Outlook you can import this file again.
In the last case locate your dbx-files in Outlook Express by using Tools->
Options-> tab Maintenance-> button Store Folder... Go to this location in
Explorer and copy those files. On your new machine do the same thing to see
where you need to copy those files to or use the Import funtion.
For more support on Outlook Express ask in an Outlook Express forum. This is
an Microsoft Office Outlook forum.
Outlook Express is family of Internet Explorer and Outlook of the Office
family.
Here is the link for the right forum
http://communities.microsoft.com/newsgroups/default.asp?icp=InternetExplorer
Good Luck!