To get Picture in Picture:
Pause the game, While holding down R2 hit Circle, Circle, Left, Circle, Circle

If you have 0, 1, or 2 continues left, when you are at the continue screen 
press and release successively on the left controller the following arrows: 
up, down, right, then left and you'll get 10 continues.

Here are some codes for Rayman:
Finish the Music Level: J5VLFP58VB
Finish the Mountain Level: J5K!ZZC8MD
Finish the Cave Level: SM!KV7WSXD
Access to Space Mama: T64H5M!?BB
Access to Skops: ?2MC9J!GTB
Image Level completed: SX2!ZP58MD
Access to Space Mama: T64H5M!!?BB
Everything except last level: SD3BKFOOMN

To get 99 lives and have every level beat with all electoons found use 
this password: 492KV3W9XD

To get 99 lives and a Full Power-Up, pause the game and hold R1,R2, and L2. 
While holding them, press CIRCLE, RIGHT, SQUARE, LEFT, CIRCLE.

On the first level press start and press circle x x triangle square x triangle x 
square x x x x then hold down all the top buttons unpause then die in the water 
four times then you have 99 lives and you are invincible.

At the password screen put 0D2KVWWMD, now all the electoons are saved and you can play
anywhere you want!