do you have the link to the CFS kernel zip. I'm not having scrolling or lag issues with the BFS (probably because I only have 3 screens and dont scroll much) but I'd like to try it to see if it helps v34 (or I could wait for v35 to come out which has it I guess. had v33 all of two days before I noticed v34 was released lol).
The CFS kernel can be found in this thread: [GPL]2.6.29.6 CFS Kernel V4 9/6/10 - xda-developers
I downloaded the V4. Just flash it from recovery like a ROM. Wiping data is not required (in fact, you probably do not want to do that), but I would wipe Dalvik cache from recovery before or after flashing the kernel before rebooting the phone.