25 boxes of paint, will only take up about 2 square meters of floor space, if you stack them with 6 boxes on the bottom.yeh you could , at room temp in the dry ,and rotate the boxes regularily so they dont get flat spots ... thats a lot of paint though I hope you got somewhere big inside to store them . try LIPS again mate ,any of the larger online shops will give you a deal if you buy that many cases but dont expect too much
EDIT..slow fingers ^^