These are all encoded with Windows Media Encoder 7 and there are supported players in Windows, Linux, Solaris, Mac OSX, et cetera.
They are set up for streaming, with the 32kbps files are intended for dial-up users, and 128kbps CD quality files are intended for those with broadband connections. :D If you wish to download and archive the mixes, give me a prod via my contact form and I’ll give you the proper link to do so. ;)