Hi CMGronlund,
Thanks for posting your question. I'm more than happy to assist you. If you wish to transfer the management rights of the domain name to InMotion Hosting we have a great article on it:
Transferring a domain to InMotion Hosting
If you're looking at changing your nameservers, here's an article on that as well:
Updating your nameservers
If you need further assistance please feel free to contact us.
Thanks!
Tim S