Default how to update rom and kernel?

been about 2 years since I last update my I9000, I dont know what to do any more. does anyone have any instructions?

I am on a gingerbread 2.3.6 and F1 Galaxy SII mod and now want to update to Kitkat 4.4.2 C-Rom with Semaphore 3.4.3 kernel

I have downloaded the rom and the kernel zip files and I have odin 1.85. but I dont know what I have to do now any more. do I have to use odin to flash the kernel now? how do I do that again, I dont know what all the different buttons mean in odin.
do I then have to copy the rom onto the sdcard and install from there? and what needs to be wiped?