[cm10][preview] unofficial 20121215 & general apple bashing in between
The ROM already contains a kernel. no need to flash the KERNEL if you're not flashaholic. The KERNEL package has a couple of modules different from the ROM but nothing more.
If you don't know how to flash these, or in what order, or you don't know what to clear, please do us a favor don't ask. Flash however you want. If you don't know the steps then...... Why are you here in the first place? Yes we all started somewhere, by using search and google, not asking the same question 20 people asked within the last 10K words. I mean come-on...