How can i just update kernel and build?

[Guest SNaRe]

I have HTC Desire. Yesterday i tried to root my phone but i had many problems. So I wanted to get it back to orginal. I couldn't do it also.

So i tried something and now my phone nearly to new version

except kernel and build

now my

kernel is 2.6.29-82821fb5

buil 1.21.405.1 CL172503 test-keys

How can i just update this ones ?