Update a PDF template with dynamic content using .NET 2005

Question

I'm looking for a way to ensure the display of official dynamic documents on my company’s website, including fonts, images, letter-head, etc. Since users have the ability to change the way their browsers display, HTML isn't reliable.

I'd like to manually create a PDF to look like a standard letter-head from our company. This PDF would have fields that will be dynamic for each user, but the overall look of the document would be consistent. I want to be able to dynamically update the fields with specific user information and serve that up in a browser to the user.

I'm using .NET 2005.

Any help would be greatly appreciated.