Jeff,
I reread your first post. I'm not sure what you need, but this might work for you.
I added templates under the "Program Units" folder in the templates section that meet our company standards. My templates have names like "My Package". Within these templates, I put $Date and $OSUSER inside comments.
Now, when I create a new package with "File/New/Program Window/My Package", the variables are replaced correctly within the comments.