With App "Lock O Clock" you can customize Lock Screen or Home Screen with Analog Clock Themes
Application Supports from iOS 3.0 to iOS 5
Clocks Included are as follows
RGB Analog Clocks
Full Screen Analog Clocks
Rounded Analog Clocks
VIBGYOR Analog Clocks
Colored Analog Clocks
Many Other Creative Clocks
* Three Easy steps to follow to Have Analog Clock as Lock screen/Home Screen
1)Select the Analog Clock Theme from the list
2)Select the background for the same and save to photo Library
3)Set As Lock Screen or Home Screen
NOTE: Kindly read the description carefully