You can keep the K-Lite codec pack installed, here's what you have to do.
1) Install K-Lite codec pack
2) Install TrueMotion 2.0 Codec found
HERE3) Change settings for TM codec in ffdshow, "All Programs/K-Lite Codec Pack/Configuration/ffdshow video decoder"
4) Top left scroll bar select "Codecs"
5) Now use the right scroll bar and find "Truemothion 1,2", under the Decoder attribute select disabled.
This will disable the K-Lite codec support and then use the TrueMotion codec you downloaded instead. The game should run fine then.
Edit:
Since you installed/uninstalled codecs a few times, you may need to use the "Codec Tweak Tool" to clean up the codecs "All Programs/K-Lite Codec Pack/Tools/Codec Tweak Tool"