Follow e mannos method for defaulting tat (it's on the net)and the only tool required is a 7lb lump hammer,but since you've already bought a new battery then you've nothing to loose by fitting it.
Get the manual and don't waste your time reading related posts on other sites,you will need one for a reprog anyway.
You've probably gathered by reading posts on here that we don't give out defaulting info!.
e manno
May 2013