How to hide Images from being shown in Gallery?

Hi,
I puchased a Nokia 5230 yesterday.I preloaded google maps using MGMaps as per the tutorial here : Preload Google Maps images and maps -> Mobile GMaps! - xda-developers

But the problem is that the preloaded map tiles which are images are now being showing up in my Image gallery.As there are over 1000 map tiles my gallery is now extremely cluttered.Is there anyway I can limit showing images in say the "Images" folder in my memory card ?

Please help