I was trying to install an app one of my other computers (running Ubuntu 8.10). The only format you could download it in was .bundle. I have never installed a .bundle app, but after some google-ing and putting bits and pieces together, I now know how to install a .bundle, and you will too.

First you need the required packages:
sudo aptitude install build-essential linux-kernel-headers linux-kernel-devel

Then you need to make it executable by using chmod:
chmod +x ./AppNameHere

Then finally:
gksudo bash ./AppNameHere