Everytime I finish a "puzzle", the game lets you know that a certain wallpaper has changed... anyone know where is located?

FOUND IT!

C:\Users\[YOUR USERNAME]\AppData\Roaming\Sierra\Leisure Suit Larry 7

The game will give you new a wallpaper every time you solve a "puzzle".

I wondered where those were. And I guess now I know where they should. But since I installed the game on the drive that doesn't have Windows installed it seems I didn't get them.

I was curious about that one too. My game is installed on a different game partition to windows C: and I did get it. I'm on windows XP so is at C:\Documents and Settings\[Your Username]\Application Data\Sierra\Leisure Suit Larry 7

Thanks. I was looking for them quite some time.