Whether to proceed is a relative issue, of course. The 8GB device had the best available capacity. You can look at sources like eBay for a dead Fuze, hoping for a better case condition, or look for a “smaller” capacity, say a 2GB device, for its casing.
The Fuze case can be split, as described in the AnythingButIpod forum. Follow the directions and photographs there. I think you’ll find the navigation through the photos to be quite useful.
Take your time, as the case you’ll be popping apart will be reused. If the tool you’re using to apply pressure to the case does not seem to work smoothly, relax, and find a more suitable tool.
Note that two of the tabs have a wee bit of adhesive on them. For reassembly, I perfer clear silicone adhesive, as it is easily removed, flexible, and far more forgiving than “one second” adhesives such as cyanoacrylates (super glues), which also have the nasty habit of outgassing during cure, exposing any fingerprints, often in places you really would not like a permanent mark.