I work for a specialist telco recruitment agency, not one of the Reed/high street type ones so I'm not 100% sure how things are done at agencies like those.
We do indeed reformat everyones CV- this is at the request of the client. And also, because they have to fit the role, and these are technical people, not CV writers, and the important/relevant experience is often hidden in the abyss of drivel. If we were to send their original CVs over, in most cases, they quite simply would not get the role.
I'd be more than happy to look at your CV, I look at hundreds every day, and place people in roles day in day out. However, it sounds like I will be 'utterly shit' at it, and you're better off doing it yourself.