It's doable. But it's not an easy task. The space system from SWR is integrated into a lot of stuff, and it's possibly more invasive a change than the Overland. For now, you're probably better off doing some smaller stuff, and getting to know the code better and make a backup before you attempt to move the system. That way when something gets messed up (and believe me it will) you can just go back to the last working copy you had and start over. It's a painstaking process, and yes, it is likely to have you working for hours upon hours.
The space system has several flaws to it though, mainly in the vector math it uses. But if you're willing to work with it, yes, it'd probably be an excellent addition to your MUD.