I was installing MOSS 2007 on Windows 2008 R2 recently and the installation went very smoothly. You basically create a slipstreamed installation source of MOSS with SP2 and run it like you would any other install – Google it – there are plenty of how-to's out there.
Everything was running fine until I tried to open a document library in Windows Explorer using “Actions”-“Open with Windows Explorer”. The browser just didn’t react, neither did Windows Explorer.
It turns out I had installed the WebDAV that comes with IIS and the WebDAV that comes with SharePoint didn’t like that one bit. Using the Server Manager I removed WebDAV from the IIS features, bounced the server and all was well.