CPA Content Locker for joomla 2.5

Hi all, the title pretty much says it all. Does anybody know of a content locker that works with joomla 2.5? I had a look at CPA lead, the problem I had was that the locker code was meant to be placed in the HEAD tags, I could not find a way to do this for individual pages. If anyone has any advice, Im all ears.

i never try this mate i have no idea but i think there is plugins