In the files section of the yahoo group 'jreceiver' you will find a rioboot.zip file that enables an NFS and port mapping.

there is a dos utilities tar.exe you can use to unpack tar files. WINRAR is perfectly OK as well.

Some of the clients when unzipped may have folders that are empty, such as the dev, but you should be able to get them by extracting them from the original software.

You don't need to go to linux. the docs cover it quite well.