How can I set Outlook 2003 to automatically set the journal to "on" when I add a new contact?
Edit: Misread your question the first time.
You can customize the Outlook 2003 forms and force the Journal to Yes, etc.
Open the create new contact form and select Tools -> Forms -> Design This Form.
Once in design mode select the "All Fields" section and then select "Frequently-used fields". Near the bottom there it will have Journal, set this to "Yes" and save the form.
Edit: I missed a step.
All new contacts should then be created with this custom form with Journal set to "Yes" automatically.
More details here at MS Tutorial.for exporting, deploying, setting default forms, etc.
Edit: Added Outlook 2003 Design Form steps