Change item path or item collision size ?

[Shrrignien]

Hi my lords is there a way to change an item collision size (like we can do with units) ?
I searched within the Gameplay Constants but didn't find any clues...

I need to change this because I replaced every items's model by icons, but due to the "item collision size" (too small), they overlap each other, and this ugly...
My only way to fix that is to lower the "scaling value" (1 to 0.7) of the items, sadly the icons are too small now, that's why I tried to increased the items collision size...

Anyway thanks for you help and happy new year

Shrrignien

EDIT : maybe there is a way to do this by changing the "war3mapMisc.txt" file... Something like :
ItemCollisionSize=32

But I don't have the knowledge to go further...