Let me start by saying sorry but this Flash method for your iPhone 4 and iPad only work on Jailbroken devices with that being said if you haven’t jailbroken your device yet it only takes about 60 seconds just Click Here.
To Install Frash (Flash for your iDevice) simply follow these directions:
1. Open Cydia > Manage > Sources
2. Edit source and add http://repo.benm.at
3. Search Frash and install it.
I also think its important to note that Frash will not make ALL Flash content work, I’ve heard it only makes 30% of Flash content work but I have no data to back this up but even if that’s the case would you rather have 30% of Flash content work or no Flash at all?