I think I have solved this level before but I just can't figure it out now, any help would be great.
I found a website that has the solutions: http://www.eskimo.com/~cdickens/INSTANT-SOKOBAN.html
Hey! Good site! But I think it's better to solve by your self a level. In this kind of sites, It's just a mechanical work. You see the solution and then do that on the program to see the fireworks. I've spent several days to solve #21 level from Aymeric's MicroCosmos. Each day trying something new, like new paths, using the 'solving from the end to the beginning' technique and the inspiration came one day.