I'd suggest to try it out with a test user...
I've examined the files in those folders, and there are no machine-specific things, in theory, it should work :)
Make sure Outlook is closed on both sides, and enable OV before closing Outlook on the new Computer.

I think I got this to work in my Lab.  In my testing I did the following with all the EV services and IIS on the EV Server stopped:

 On the original User machine I did this:

• Exported the registry from HKEY_CURRENT_USER\Software\KVS\Enterprise Vault\Client
• Copied the folder from C:\Documents and Settings\UserName\Local Settings\Application Data\KVS\Enterprise Vault

On the new machine I did this:

• Set up Outlook to work Offline on the new computer, but I did not configure or enable offline vault.
• Imported the registry file
• Copied the data folder to Copied the folder from above to C:\Documents and Settings\SameUserAsBefore\Local Settings\Application Data\KVS\Enterprise Vault
• Launched Outlook offline and was prompted that Offline Vault was now enabled.  I exited out of the screen without doing any downloads and EV services were still stopped.
• I am now able to successfully open archived items working offline and IIS and  EV services stopped.

You could try that, let me know how it goes for you.  :)