The server does NOT have to run as a webserver, it's just a storage place for files. It's possible to use almost any existing PC in this role, consult desktop support. Place your current pages under there. See info on 'Mirroring' and 'Structure' for advice on this. Please archive or delete all existing satellite copies to avoid future confusion.
Access is easier to maintain by role that individual.
If you use NT authentication, consider setting permissions as 'groups'. Open or create your web in that location using your editor. Dreamweaver, Homesite and FrontPage users can set the 'root' of the current web to that directory. Use it However you choose to publish your files, step by step by FTP or using your editors built-in 'Publish' function, you should be able to do as before. This in-between location is also a great location to test and proof content changes before going live.