i4Siri is working perfectly with all models of iOS devices iphone 4, ipod touch 4G and on iPhone 3GS but no we can tell you the method to how to install i4Siri on iPad and iPad 2. by using the following tutorials or method you can install i4Siri on iPad and iPad 2 :-
1) Put the repo http://idevicedaily.com/repo
2) Add another repo http://i4siri.com/repo
3) just install i4siri for ipad
4) Jump to Setting>General and let i4Siri turn on
5) Go to Setting>i4Siri and touch on install certificate
Now you have Perfectly done this.
Be Sure that You put http://i4sirifree.mooo.com in the proxy setting of Spire.