your iPad is jailbroken right?
the location is different for each device but you should find a link to Applications right in the root /
the applications will be located at: "/var/stash/Applications.XXXXXX" where the XXXXX's is a custom set of text on your device.
Make sure you load up cydia first and install any required updates that pop up. It will relocate the apps to a section of disk that is not size restricted.