Item Resize works for me and im using Blender 2.61 and an older one when i need to export for IT projects. And i meant getting it back into blender as Raven Said " I did not save them as .blend files so I might have to do them over again! so how do I rescale them without using the blender program?"
She did not save em as blend file meaning u cant put the mesh back into blender unless u know how etc. There is a way but i have not yet to go and figure it out~
blender is tricky and i know not of all the ways to fix things yet, but always make sure the model pieces are all joined in blender before exporting, i dont make my material or textures in blender, too many issues when u export them so i do it in object maker~