XCode for iprocessing????

i am interested in developing a processing app. for iphone simulator.

for which i've downloaded iprocessing for iOS3 & xcode for mac.

i am completely new this concept- xcode.

As per the site

i've open one of the eg. of iprocessing & tried to bulit 1st but giving an error of 'dependencies'.

can any one help me with this[incase i am doing some inappropriate steps for execution].

the complete guide on how to open pde files[ or about xcode] & execute in simulator, will be gr8.......

thx in adv