How to disable CiM expansion packs (downloaded via Steam)

[unmerged(430603)]

Hello,

I bought CiM about 3 days ago & liked it so much I bought every possible expansion pack in existance 20 minutes ago.
Problem though: Steam auto-updated CiM as soon as I bought the expansion packs, however, some of the expansion packs allowing futuristic transportation methods in let's say 1923 Berlin have taken away ALL of the challenge of the game. How would I go about disabling them?

Your reply is much appreciated,

belGician

 

[giladteller]

Another solution is using a mod that changes the apearence date of all vehicles to the real date.
http://citiesinmotion.wikispaces.com/DLC+time+fix
Disabling the DLC is problematic in Steam since Steam will see the DLC not loading and fix it.

 

[unmerged(430603)]

Thanks for creating the mod Giladteller, works great!