Collecting email addresses to Contacts from email folder?

[roomservicetaco]

Is there a way to gather all email addresses (either from, to, or cc) in a
particular email folder in Outlook and store them in a delimited file?
Alternatively, is there a way to add all email addresses from all emails in a
particular folder to Outlook Contacts or to the Outlook Address Book?

My problem is this: my phone number is changing and I'd like to send an
email to everyone who has either sent me an email or to whom I've sent an
email announcing the change.

Any other way to solve the problem?

I'm running XP Pro and Outlook 2003 (11.8217.8221) SP3.

Thanks.