Using CDJ2000s with Traktor Pro 2 but...

OK, My home set up consists of 2 x CDJ2000s, a Behringer DDM 4000 mixer and Traktor Pro 2 on a sony vaio laptop, Traktor Pro 2 is working fine, decks are working fine, no problems at all to report (so why i am i posting?)

I am playing a club in 3 weeks that have CDJ900s, now I know that cdj900s work with traktor pro 2 in almost the same way as it does with the CDJ2000s but will i need to install cdj900 drivers onto my laptop as well as the cdj2000 drivers it aleady has?

If I need the cdj 900 drivers are there any issues with having both sets of drivers at the same time, if no, will traktor realise I have connected to 900s and play as it does on the 2000s or will i need to change the external routing etc etc?

Thanks in advance for help on this subject

Wicked Neo