how to install the latest kernel, xorg and mesa on 11.1

Hello, I want to use the kernel 2.6.31 and the latest mesa 7.6 is it possible on Suse 11.1.

Short answer: Yes.

Long answer: wait for 11.2 and you will have all this. It is possible to have 2.6.31 and latest Mesa, but it will likely bring you trouble you cannot solve on your own. And, if you’re starting to break a stable release, you’ll find you’re pretty much on your own. So, my suggestion is to wait until 11.2 is released.

Is it possible to upgrade 11.1 to the 11.2 beta without DVD, via internet.

Yes, it is.