Why? Just change the Browser-Identity (BrowserAgent) in HTTrack to the Safari
IPAD e.g.:

Mozilla/5.0 (iPad; U; CPU OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10
(KHTML, like Gecko) Version/4.0.4 Mobile/7B334b Safari/531.21.10

and you receive the IPAD result. Otherwise you can use the Atomic-Webbrowser
to grab websites directly on the iPad.