Here is how I installed Linux Mint Menu in Ubuntu 9.04 Jaunty Jackalope. I downloaded the following packages from the Linux Mint Repo which can be found here:
These are the packages (current versions at the time of writing, I recommend you download them from the repository than from these links):
For my 64-bit version (amd64), the mint-info package is:
For 32-bit, it may be different. Try:
Now, install one by one in the following order:
After the installation is done, right click on the panel and select Add to Panel. Then find mintmenu and add. To change the icon, right click on the menu and click on Preferences and then in the Button Icon, put in the full path to custom icon. You may want to put in /usr/share/icons/Human/22×22/places/start-here.png
Please share your results.