He is suggesting you install the 1e29e8e7 file that is available on that post #118. It is a nicely centered clear slider.
Many of the sliders we sprint users try are off center a bit, you can search for ones that have been reset like above or use a manila editor and move graphic's position in the file yourself for any slider you're wanting to use. I usually have to move them down and to the left to get a centered slider but each is different. I find the easiest manila editor is Chainfire's gui editor from the XDA site... Here is a link to the discussion:
http://forum.ppcgeeks.com/showthread.php?t=54178