Currently my icon size is 32x32 so my grid displays all images as 32x32 regardless of their true size. I would like to be able to display them as 64x64 or in-fact larger. How could I do this without increasing my world icon_size?

I've check the skin reference but no luck. Any help would be greatly appreciated, thank you.
You can't do it without changing world.icon_size.
In response to Kaiochao
That's so unbelievably annoying. Now I have to manually increase the size of my icons to cover up a design fault. Grr...

Not your fault, I'm just not pleased. Thanks for the help anyway.
In response to Kyle_ZX
I think that might just scale your icons back down to world.icon_size, or something. All I know is it won't show up any larger than world.icon_size.