UltraMixer

UltraMixer is a DJ mixing software which enables you to mix digital music in various formats such as MP3, WMA, AAC, OGG, WAV or CDs in real time.

UltraMixer supports the following hardware controllers:

Denon DN-HC4500
Behringer BCD3000
Behringer BCD2000
Hercules DJ Console MK2
Hercules DJ Console
Hercules DJ Control MP3
Numark Total Control
EKS XP10
M-Audio Torq Xponent

Versions:

UltraMixer Professional - License conditions: commercial use permitted, free updates
UltraMixer Basic - License conditions: only non-commercial use permitted, free updates

A guide is available to purchase in pdf format

Listed Features Link

Ultramixer DJ Software Link

Download Demo here

I have this and it works great... however I have two queries with it that I cant seem to get a reply from them about... How to beat match between auto dj mixing and how I can listen to a track before playing it through the internal sound card... I have it set to monitor track via internal sound card but cant figure out where to play it.

Have you joined the user forum on the website, you can get a lot of support from there !

Didnt even notice they had a forum... heading over there now ;)