Installing cracked app's in iOS 3.0, 3.1, 3.2 @ 4.0

Via wifi method:

• Jailbreak first using spirit or other JB device in higher version
• Go to Cydia
• Tap on Manage tab
• Tap on sources
• Tap on “Edit” and then on “Add” , type in the hackulo.us repository which is http://cydia.hackulo.us
• Tap on Add Source
• After the source is added, go to “Search” in Cydia and search for AppSync for OS 3.0 or other's
• Install and Confirm
• Select the applications you want and click sync, they will be synced without any errors

or patched w/out wifi:

• install afc2add (in cydia search afc2add) and run appsync w/ out wifi