Are you sending a whole address book, just an update for you or
something in-between?
For an individual entry, using vCard (*.VCF) file would be best.
If you are in a corporate environment, when people need a shared address
book, you might consider sending a whole WAB file that they can use on
the side in addition to their private WAB.
The Windows Address Book (WAB)
http://www.insideoe.com/files/wab.htm

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Mike - http://pages.prodigy.net/michael_santovec/techhelp.htm
> anybody knows how can i make an executable address book from outlook
> express so that my users just click it to update their address book
> whenever i send them the updated address book rather than importing
> it.
>
> Thankx!