Please go ahead-I would be honoured if you did so. Please do visit my page and would appreciate your valuable comments on the rest of my PPTs on various Etiquettes.
Colonel Jude Mayne
2nd September 2009 From India, Bangalore
You may be correct about the word not having a plural but used it many a time and confirmed by wiki-pasting a copy:-
etiquette (plural etiquettes)
The forms required by good breeding, or prescribed by authority, to be observed in social or official life; observance of the proprieties of rank and occasion; conventional decorum; ceremonial code of polite society.
Col Jude Mayne
27th September 2012 From India, Bangalore