Actually if you look at a rat head on you'll see that both their eyes are visible. This makes sense, it's how they see where they're going.
According to this website, rat vision looks something like this:
It's a little blurry in general, they don't have really great eyes. You can watch a video of it with the right 3D equipment.
In this paper the vision for each eye and the combination is shown.
Theoretically you could make some goggles that emulate the field of view for a rat and wear them around. Such augmentations have been done to turn people's vision upside down and the amazing thing is, people's brains eventually interpret this vision correctly, right side up.
For smell you could try mapping it to a visual sense, like the aliens in the Alien vs Predator games.
But it's more likely that mice and rats simply correlate a smell with what they're currently seeing. I can't seem to find the study, but I recall a Morris water maze test where smells and images were associated with the location of the maze exit. It's vague in my mind though, so may not exist.