^ Sounds good damosis. Let me know if you have any questions about the procedure prior to or during the job.
As info, I bought the 1/2 inch wide x 1/2 inch thick self-adhesive foam tape on Amazon.ca. Here's the link to the listing:
Buying 50 feet of the stuff I had plenty of foam tape left over!
Before you buy anything or start the job, I suggest you make doubly certain the rattle is coming from the front passenger door panel and not from something like the front passenger seat headrest (which can sometimes be the bad actor, especially when a passenger isn't sitting in the seat).
I've attached a photo below of my front passenger door with the inner panel removed and the foam tape applied around much of the door frame where the outer perimeter of the inner panel meets with the door frame. Prior to removing the inner panel I ran some painter's tape around the door frame (following the perimeter edge of the inner panel) to serve as a border/template for where to place the foam tape. My reasoning was I didn't want to see any foam tape showing at all once the inner panel was re-applied.
View attachment 61143
Good luck with the 'project' and Happy New Year!
Richard