If you are having problems with Outlook 2003 crashing since installing the September security update (and had to disable your add-ins to prevent the crashes), a hotfix is now available that addresses this issue and allows you to use your add-ins.
MS10-064: Description of the security update for Office Outlook 2003: September 14, 2010
Description of the Outlook 2003 hotfix package (Outlook.msp): October 18, 2010
Published November 4, 2010. Last updated on June 17, 2011.