Fireworks swap image problem

Hey,
Here: http://www.papamofoman.com

I’ve done the navigation in fireworks using simple rollover behaviours.

I’ve tried to do this before but always failed: to have the swapped image stay there, once clicked, until another button is clicked (then obviously the swapped image for that one stays), while still maintaining the rollover behaviour.

I tried it by adding a swap image behaviour and disabling “restore image on mouseout”, but the swapped image just stuck there.

So, is there any way I could do this?