This may not work for all of you- hell, it may not work for any of you, but it's been requested and this is the only way I know how. Your minecraft install is located in either \appdata\.minecraft (for pre-vista windows users). Or in \appdata\roaming\.minecraft (for vista/win7 users) In there you will find a file called Minecraft.exe- which you use to launch Minecraft itself. I don't know if you can leave the file name the same- I've never tried, but this is my solution to allocating memory and making it work where it would otherwise not work. Step 1: Rename your Minecraft.exe to Minecraft.jar. (Yes I'm aware you have a minecraft.jar in the \bin directory- don't touch that one) Step 2: Use notepad to create a .txt document with the following text: java -Xmx1024m -Xms1024m -jar minecraft.jar And save it to your .minecraft directory. Then rename it to "Run.Bat" Then double click it. It should launch Minecraft, but with the specified memory parameters- xmx being the max memory minecraft will use (any more than 1024 tends to wig out for most people- mine will wig out beyond 800), and xms determines your initial heap size. For added complexity you can add a -Xmn100m (which determines the rate at which your Java Virtual Machine handles garbage collection- although unless you're running a server this last argument isn't strictly necessary. So yeah, this is Kerrus' incredibly ghetto minecraft tutorial. Enjoy.