The instalation will offer to upgrade the old, & will reconnect to your data
file.
However backup of the data file is allways advised, whether upgrading or not

"michigan" wrote in message
...
at present i have Outlook 2003 on Vista Premium, i have recently purchased
Outlook 2007 full stand alone version. When i install the 2007 Outlook how
do
i avoid losing everything i have in Outlook 2003? e.g. inbox, sent
messages
and contscts, as much as i want to upgrade to 2007 i don't relish the
thought
of losing all of my mail and having to re enter all of my address book and
contacts. Kind regards.