A friend of mine has downloaded (I'm sorry to use that word here) the new Jean Michel Jarre disc, AERO. I have one from The Alan Parsons Project (On Air) that was in the same format, I think (DTS 5.1), the problem is he downloaded it in AAC and is not sure if recording it with nero would keep the 5.1 structure.
BTW, this kind of special audio-cd cannot be played on normal cd equipment, I could only read it on my DVD (DTS). Is there anyway or a program to downsample them to stereo (2.0) in order to be playable on any hifi?

Foobar2000 can downsample to 2.0

Download and install the special version.

Right click on the file and select convert > settings. Change relevant settings to suit you.

Tick Use DSP (don't forget to untick for future conversions, it'd be nice if foobar2000 prompted those stupid enough to forget (me)).

Go to DSP settings.

Move Convert 5.1 to stereo to active DSP list.

Close.

Right click on your file and select convert > run conversion.

A DTS CD should be playable on any CD player that has digital output, which would then be fed to a DTS decoder or receiver. WHen DTS and DIgital Dolby were first demo'd at audio shows the big advantage for DTS was that it was stored on a regular digital audio track so was compatable with existing CD and laser disk players.. though you of course had to get a decoder.