CEP 1.69? You mean NWN 1.69? If so, no!! Its still in Beta form, and might mess EFU up on your end if you installed it. Wait for the final version--I've been working on a content patch to release with it to fix anything that breaks, and adding new head models, and other really cool stuff. (Models, WEAPONS that are freaking NICE) and size fixes to current weapons.
CEP 2 is on version 2.1 right now, I think.. You can use any version of CEP1 1.51 and forward, and be ok though.
Confoozing enough?
I know.... 1.3 this, 9.4.332. that... BLAH!