Install Linux kernel Version 3.2.xx

How do I install Linux kernel version 3.2.xx without compiling the Linux kernel from source code under Debian Linux Squeeze version 6.x running on HP hardware?

Tutorial details
Difficulty	Easy (rss)
Root privileges	Yes
Requirements	Reboot
Estimated completion time	N/A

Debian Linux 6 comes with the Linux kernel version 2.6.32.xx only. However, you can install the Linux kernel version 3.2.xx or newer using backports. From the page:

Backports are recompiled packages from testing (mostly) and unstable (in a few cases only, e.g. security updates) in a stable environment so that they will run without new libraries (whenever it is possible) on a Debian stable distribution. Backports cannot be tested as extensively as Debian stable, and backports are provided on an as-is basis, with risk of incompatibilities with other components in Debian stable. Use with care! It is therefore recommended to select single backported packages that fit your needs, and not use all available backports.

Step #1: Add backports

Edit /etc/apt/sources.list, run:
# vi /etc/apt/sources.list
Append the following line:

deb http://backports.debian.org/debian-backports squeeze-backports main

Save and close the file. Run the following command:
# apt-get update

Step #2: Install the Linux kernel 3.x.xx backport

Type the following command to search kernel image:
# apt-cache search linux-image-3
Sample outputs:

linux-headers-3.2.0-0.bpo.2-amd64 - Header files for Linux 3.2.0-0.bpo.2-amd64
linux-headers-3.2.0-0.bpo.2-rt-amd64 - Header files for Linux 3.2.0-0.bpo.2-rt-amd64
linux-image-3.2.0-0.bpo.2-amd64-dbg - Debugging infos for Linux 3.2.0-0.bpo.2-amd64
linux-image-3.2.0-0.bpo.2-amd64 - Linux 3.2 for 64-bit PCs
linux-image-3.2.0-0.bpo.2-rt-amd64-dbg - Debugging infos for Linux 3.2.0-0.bpo.2-rt-amd64
linux-image-3.2.0-0.bpo.2-rt-amd64 - Linux 3.2 for 64-bit PCs, PREEMPT_RT

Type the following command to install the Linux 3.2. for 64-bit systems:
# apt-get -t squeeze-backports install linux-image-3.2.0-0.bpo.2-amd64 firmware-linux-free
Sample outputs:

Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  initramfs-tools linux-base
Suggested packages:
  linux-doc-3.2
The following NEW packages will be installed:
  firmware-linux-free linux-image-3.2.0-0.bpo.2-amd64
The following packages will be upgraded:
  initramfs-tools linux-base
2 upgraded, 2 newly installed, 0 to remove and 14 not upgraded.
Need to get 23.7 MB of archives.
After this operation, 117 MB of additional disk space will be used.
Do you want to continue [Y/n]? y

You may be prompted to accept or deny few changes. Reboot the system:
# reboot
Finally, verify that you are using Linux 3.2:
# uname -mrs
OR
# cat /proc/version