http://www.slipstick.com/outlook/olcat.htm#top should help

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Milly Staples [MVP - Outlook]
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After furious head scratching, C. Davey Utter asked:
| I have built a rather extensive Category list on my desktop, I'd like
| to add it to a laptop so that thye are the same. What's the name of
| the file and where do it live?
C. Davey Utter - 31 Oct 2005 03:19 GMT
Great, I got the first part done, the backup of the registry, but I
don't see how to transfer it over to the laptop. The provided
directions are not specific to OUTLOOK 2003, and I don't see how to do
it. I know you'll point me in the right direction...so, THANKS! Maybe
the fact aht I have been up and doing this stuff for 26 hours is
effecting my abilities...NAH!!!
>http://www.slipstick.com/outlook/olcat.htm#top should help
>
[quoted text clipped - 10 lines]
>| to add it to a laptop so that thye are the same. What's the name of
>| the file and where do it live?