The Micro Edition of PhotoShop CS4 is only 53mb, but it is the full program (not portable). It comes precracked, saving you time. The reason it is such a small file size is because the extra language packs, plug-ins, and other rarely used features have been completely removed. The installer has also been completely redone. Instead of that annoying 15 - 30 minuet install, it only takes 30 seconds to 1 minuet to install the entire program. Sense most of the unused features are removed, this version of Photoshop loads fast and runs much smoother.