Replacing images in doc

I've read several posts here on image manipulation and gone trough the samples of adding images, and are still not sure how to go about replacing images..
so a couple of questions,
should I use the Picture Content Control binding? not sure how that would work (found a sample here http://www.codeproject.com/KB/office/Wo ... mages.aspx but it's in C# or something...)
or
should I have an placeholder image in the template, then in code, remove that part, add new image and update the relationship. If so, how do you do that? (removing and updating I mean)
or a better approach?
thx,
K
so a couple of questions,
should I use the Picture Content Control binding? not sure how that would work (found a sample here http://www.codeproject.com/KB/office/Wo ... mages.aspx but it's in C# or something...)
or
should I have an placeholder image in the template, then in code, remove that part, add new image and update the relationship. If so, how do you do that? (removing and updating I mean)
or a better approach?

thx,
K