If you are on WiFi, that app should download with no problem (the 50mb restriction is only if you are trying to do downloads via 3/4G).
That said, you can still get it on the iPad using iTunes. To do:
Connect the iPad to iTunes. Before you do anything, right click on the iPad tab and select "import purchases." This will make sure iTunes correctly reflects what you have on your iPad.
Then, in the main iTunes page, select the Apps tab. Scroll down the apps list until you find the app you wish to put on your iPad and click on the "Install" button. The button should change to "Will Install." When you are done selecting apps, press the "Apply" button in the lower right of that view. iTunes will do its magic and load the app onto your iPad.
And, you're done. Good luck and let us know how you get on.
Marilyn
