Tried the svn version 822, using 2.4.5 ck2, with and without horselords, I must be missing something as it crashes on startup either way. Conclave is of course off, as is TRD.
I'll try disabling DLC's one by one and see if I can find which it is.
-edit
Well 822 svn - boots up with 2.5.2, will let you guys know how stable I find it.
See my post above yours, with 822 and 2.5.2 I have random CTD after a while. The more I play the more frequent CTD are.