Code:
How to install Flash 10.1 on Jailbroken iPhone 4

Step 1: Jailbreak your iPhone 4, iPod Touch 3G and iPad 3.2.x with JailbreakMe.

Step-2: Start ‘Cydia’ on your jailbroken iPhone 4 iOS 4.0.1 springboard.
Step 3: Select ‘Manage’ tab at the bottom of your iPhone screen and then select ‘Sources’.

Step 4: Select ‘Edit’ and then select ‘Add’. Now enter a URL source. Type ‘repo.benm.at’ and select on ‘Add Source’. Once Cydia has added the source click on ‘Return to Cydia’ button.

Step 5: Once the installation is completed. Search for ‘Frash’ in Cydia and install it.

Step 7: Reboot your iPhone.

DONE! :D
ja sam ga ovako instalirala i radi
doduse, "tezi" fajlovi (aka jutjub) i dalje ne funkcioniraju - javlja "connection failed. np.c:389"