While searching for a lag fix, I found this..
http://forum.xda-developers.com/showthread.php?t=784691
Currently Included Lag Fixes:
Root + Superuser – The APK includes an update.zip that will root+superuser your device. Android 2.1 does not support auto-running/recovery mode from apps, so you will have to manually enter recovery mode. Android 2.2 does support this, so it may be added in the future.
EXT2Tools – This installs the correct busybox and some ext2 tools for checking the filesystem, etc.
OneClickLagFix V1+ – The included lag fix is called ‘OneClickLagFix V1+’ and is a heavily checked version of the original 1.0 One Click Lag Fix Script. It contains additional checking, the app and app-private folders, as well as filesystem checking on boot. It has a slider that controls how much space the lagfix will use. Further to right will mean you can install more apps, but you may have to remove some when undoing the lagfix. Further to the left means less space for new apps, but will make it much easier to uninstall.
OneClickLagFix V1+ Remover – This should painlessly remove the lag fix for you.
Space Checker – You can check the amount of free space still available for apps after the lag fix is installed using the option in the app. Works for all lag fixes.
Change Scheduler – Changes the kernel I/O scheduler. More details in app.
What is this lag fix version for?
A lot of people have trouble with the script versions. This aims to make a simple lag fix that anybody can use. It has a lot of checks, and does not remove any files that the system is using. This hopefully means that this lag fix will cause zero problems. In the event that a lag fix fails, the app should undo the lag fix and leave your device as it started. You will have the option to mail the log to the lag fix developer (me in the case of the stock lag fixes).