Make a folder in your new PC - copy the message files from the CD into it (make sure you copy all the files, whatever they're called) - make sure the "Read only" attribute is turned off for the files after the copying is complete.
Run OE - Go to File - Import and follow the wizard. At the appropriete place select "import from a store folder" and browse to the folder you've stored the message files in. continue the wizard and they should all be back in place.
Please note I've deliberately said "message files" to avoid confusion. The things you think of as your Inbox Folder is not a folder on the disk - it's a database file called Inbox.dbx. All the message files are stored together in a single folder - as you will see.