Changing Kernels

[Reamer]

I have searched for a good while for a fix to get my brightness settings to adjust. They're all the way up right now and in low light it is really murder on my eyes. Display settings show no option to adjust and the Fn keys don't have an effect either. I have the exact same problem in Ubuntu 10.04 but I have a new kernel that is made for my laptop (Dell Inspiron 14R n4010) that fixes the problem and makes my Ubuntu partition work flawlessly. It's three .deb files that make this kernel up and since BackTrack 5 is made off of Ubuntu 10.04 I figured that I would try to install these with

 dpkg -i file.deb

and they all install perfectly. I reboot, and my grub menu doesn't show anything different than before. Just my Ubuntu, Windows, and then BackTrack. I did run

 update-grub

as well and checked in Synaptic to confirm that they was installed. My question is, can BackTrack use a different kernel and if so, is there a conflict of using the same kernel on two different distros on the same machine?

I appreciate any help and just let me know what output y'all would need to see to help troubleshoot this. I would have included some but I don't know what output would give any help to this issue.

[sickness]

Backtrack has a custom kernel, changing it will 100% mess up everything.

Also this action is not supported here.