Can i map other folder to Launchpad I am using OSX 10.8. 
Is it possible to map an extra Application folder to launchpad so that launchpad will pick .app from that folder too ? 

I have osx install disk names OSX and i install apps in 'Applications' folder. Now i have added one more disk named "Macintosh" i have installed some programmes in that disk too. I want to get the apps in Macintosh>Applications in Launchpad. 

There should be a way right ? 

Does that makes sense ?
You can try to "symlink" the files on your other partition to your Applications-Folder.

For example:

ln -s /Volumes/Macintosh2/Applications2/App.app /Applications/


Launchpad follow the symlink and show the Apps.