well its probably no help at all but i found this website simply by googling it. it has loadsa pics n stuff..mayb you've already googled it and seen this.
http://web.njit.edu/~am32/Technical%20Procedure.doc
lol i like to at least try to help ppl out wen they post questions.
if that is no use then mayb u cud find sumfin else here:
http://www.google.co.uk/search?hl=en...s+racket&meta=