Ubuntu Guide posted a guide about installing Kernel 2.6.37 & 2.6.38 in Ubuntu 10.04 from PPA

Ubuntu 11.04 Natty will use Linux Kernel 2.6.38 as its default kernel. And if you want to try this kernel & the latest 2.6.37 in Ubuntu 10.04 LTS, you can install it from this PPA.

  Install latest kernel 2.6.37 & 2.6.38 in Ubuntu 10.04 from PPA