i would recommend you check out the cd burning audio mixing products at
Acoustica i briefly used the mp3 mixing software and found it very powerful and easy to use verses most of the bpm matching mixing programs out there. if you are looking for a bpm mixing program there are probably better options.
personally, i don't beat mix any of my cds and found the acoustica product allowed me to quickly create a mixed with custom cross fades etc. it's a bit like using a word processor where you cut and paste the songs you are mixing into a document , edit them and same them out as a mixed file. it's also leaves the source files intact, non destructive editing.
if i had a more powerful pc i'd exclusively use this sw, but unfortunately the budget dosen't allow for a new pc, so i'm using the Roxio Toast/Jam combo and kosmettes G4 Mac. It produces great sounding mix cds, but not quite as easy to use as the Acoustica product.
vansmack has made use of the acoustica product based on my recommendation...