The site link is dead: could you post the instructions here instead?
Found it !!!
Similar trick, different file
See the webpage on
igeekstore.com/blog/jailbreak/2011/06/18/how-to-get-whatsapp-work-in-ipadipod-touch/
for a -working- solution to the sync / authorization problem with WhatsApp on iPad
Hope it helps others too.
My iPad now has WhatsApp running, and iTunes not complaining about that