I need to change combination but lost my manual

"How can I program my electronic keypad lock when the instructions with the Programming Code have been lost?"
The back plate of the keypad side of the lock on the exterior of the door has a sticker which includes the serial number, six digit programming code and two pre-programmed four digit user codes. The lock must be disassembled to a point the exterior of the lock can be pulled away from the door and the information on the sticker made note of.

Complete installation & programming instructions can be found here:

http://consumer.schlage.com/Project%20Documents/P515-858.pdf

Notice that the above is a .pdf filetype. That means that you need to have Adobe Reader or similar installed on your computer to view it. So if you are unable to view the file, download (for free) and install Adobe Reader first. You can get it here:

http://get.adobe.com/reader/

Videos for installing and programming can be found on this page:

http://consumer.schlage.com/Service-Support/Pages/InstructionandManuals.aspx

Scroll down and find them under the heading Electronic Security--Keypad deadbolt 365

Good luck--and please provide feedback if this helps!