This native iPhone app is an offshoot of "Services" by Chris Hoffman. The app expands on services by adding some more options and focusing on being a complete preferences replacement. After installing BossPrefs? you should be able to remove Customize, SMBPrefs, and Settings icons from your desktop.
Install by adding my installer repository here:
http://sleepers.net/~iphone/repo.xml
Here is the google code page for it:
http://code.google.com/p/bossprefs/