Is it possible to use a 2.6.38 kernel with 10.10?
You can also use the debs coming from Natty... Just go here and download the "linux-image-2.6.38-" and the needed "linux-headers-2.6.38-" you want and install the debian files. They should work with no issues.
Here are the files that you need.
http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.38-natty/