I bought the PC version of RE 4 thinking "I'll download the mouse patch and then everything will be fine."  NOT.  Even with the mouse patch, aiming is a supreme pain in the butt.  The game does not interpret mouse movement well at all, so your aiming sight moves way too fast.  Even with the mouse sensitivity turned all the way down, the aiming sight moves too fast.  Not only does it move too fast, it moves in stops and starts instead of smoothly.  So don't think the mouse patch makes this game playable.

Also, the graphics in the PC version are unbelievably bad.  They're worse that the original Gamecube and PS 2 versions. I've heard there is a graphics patch you can download, but with the mouse working so poorly in the game there's no point.  My advice to all the RE 4 fans out there is to get the Wii version.  It looks beautiful, and with the added ease of aiming with the Wiimote it's much more enjoyable to play. Yeah, you won't be able to download all the characters mods, but at least you'll have a good time playing the game.  Seriously, the Wii version rocks.
I bought the PC version of RE 4 thinking "I'll download the mouse patch and then everything will be fine. "  NOT. Even with the mouse patch, aiming is a supreme pain in the butt. The game does not interpret mouse movement well at all, so your aiming sight moves way too fast. Even with the mouse sensitivity turned all the way down, the aiming sight moves too fast. Not only does it move too fast, it moves in stops and starts instead of smoothly. So don't think the mouse patch makes this game playable. Also, the graphics in the PC version are unbelievably bad. They're worse that the original Gamecube and PS 2 versions. I've heard there is a graphics patch you can download, but with the mouse working so poorly in the game there's no point. My advice to all the RE 4 fans out there is to get the Wii version. It looks beautiful, and with the added ease of aiming with the Wiimote it's much more enjoyable to play. Yeah, you won't be able to download all the characters mods, but at least you'll have a good time playing the game. Seriously, the Wii version rocks.