I) This tweak lets you fine tune your memory for better performance. You need at least 256MB of RAM to do this.
1) Go to "Start", then "Run", and then type in "Regedit"
2) Locate the following key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
3) Double Click "DisablePagingExecutive", select "Decimal" and put a 1 in the blank. This allows windows to keep data in memory instead of paging sections of RAM to the hard drive, Click OK
4) Double Click "LargeSystemCache", select "Decimal", and put a 1 in the blank. This allows XP kernal to run memory (improves system performance a lot). Click OK
5) Create a New "Dword" by right clicking in the "Memory Management" Folder. Once the "Dword" is created, name it "IOPageLockLimit". Double click it and select "Hexadecimal", put a 4000 in the blank if you have 128MB of RAM, set it to 10000 if you have 256MB of RAM, or set it 40000 if you have 512MB of RAM or more. This tweak will speed up your diskcache. Click OK
6) Reboot for changes to take effect