Sure, it's possible. There are a few ways to do it. You can include the full runtime in the temp folder and then execute the installer as part of your update.
There are other ways that use less bandwidth -- like using a bootstrapper to detect if the latest runtime is installed, and to download and install it if it needs to be. It's up to you.
Tell me if this helps.
Thanks.
How to detect whether access runtime(or product) is already installed or not?
I don't know the specifics of Access Database Runtime Engine, but I suspect you could do it a few ways. You could detect whether the Uninstall registry key existed for the Runtime engine. Or you could make a function call of one of the Access function that would succeed only if the engine is installed (if it fails you know the user doesn't have it installed).
I'm sure Microsoft has this documented somewhere. You could ask them over at their Connect forums.
