If you are looking to optimize the game for your PC rather than just saving space:
If your goal is a tiny, legal copy of Resident Evil 4 , you have options: resident evil 4 pc highly compressed 15 full
that expands to roughly 5-7GB on installation. True 1.5GB final install size would require removing content, so be wary of anything smaller than 4GB after install. If you are looking to optimize the game