Reply to 4 Deck Setup Traktor Pro 2.5 + Kontrol F1 + audio 8?

Hello Guys,

I'm sure this is prob. a noob question, however i wanted to get my 4 channel set up going since i am getting my F1 next week.

My set up:
Windows 7
Traktor 2.5
DJM-600 Mixer
CDJ 400 - Deck A
CDJ 400 - Deck B
Kontrol X1 - Global
Kontrol F1 - Deck D

obviously i want to have an independent channel for the F1. i use my x1 as samples as well but the A/B volume fader has to be up so i get sound... doesn't work for all transitions

My Question: do i need an extra sound card, or with what i have i can route it somehow to work?

thanks peps.