its all about what ya recorded it onto.

if you get a programme called sonic foundry vegas then you record the whole mix, then cut up each individual track into seperate files then record disk at once on your burning softwere.

thats how to do it in short but ill explain it later in much more detail if ya want.
thats what i use and how i make my cds but im sure theres over ways that peeps know about.
my way takes alot of time and effort but the track marks are seamless.

cas