I have downloaded my BB Curve's memopad files to my PC and am now trying to transfer them from Outlook "Notes" format to my new iphone 5?
You'll need to setup an iCloud or IMAP account on the iPhone.
Take a look at this Apple doc -> iOS: Syncing Notes
iOS can sync Notes over the air using iCloud or an IMAP email account. This article explains certain sync behaviors and shows how to enable Notes syncing.
Retrieving data ...