Vista Backup back's up game pak files

I am a lot annoyed with Windows Vista Backup and Restore center.
It does not allow much of customization what will be backed-up.
For example I would be glad if it would not backup my Program Files folder.
Why the hell does it need to backup Crysis level files? They have .pak
extension, and they only take 4GB and I see it backed these files 5 times
already (so it is about 16GB of wasted backup - that is a lot).
What kind of dumb-a55 product manager made this feature work like this?

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