how easy is it to fit a pushlock damper to my forks , advise please and how to do it

http://www.pinkbike.com/news/tech-tuesday-rockshox-motion-control-service-2010.html

except, you can skip any of the bits with the fork lowers, just remove the damper from the fork leg top, replace oil as necessary, fit Pusloc damper, done!

You’ll have to buy a whole new compression damper (ie not just the top bit -although it used to be possible to get the spring out of a poploc damper when converting from pop/pushloc to fork top, you can’t do it the other way). However plenty of people out there fed up with pushloc so you will not find it hard to sell on the fork top damper if it is a motion control/threshold one.

I’ve got a complete Pushloc conversion (including the required damper), in the For Sale section.