Instructions:Basically as the title says - Shockwaves Mess Constructor Ultra Strong Hair product is only £1.23 in my local Sainsburys (Melksham, Wiltshire), but I have no reason to think this isnt nationwide as the price is £1.23 on www.sainsburys.co.uk. but I dont know if you would definately get the right box.
The good thing is there are promo packaging versions of this offering a £2.00 off voucher for www.play.com i.e. you can buy the gel and still save 77p. Yay.
The downside is the selection of CD's is limited from the ones @ www.play.com/shockwaves but they still have some new ones including Newton Faulkener, The Wombats etc.
If you have a look, you might find something you want.
Hope this helps someone.