Trying to find aperture library in back ups

Hi Guys,
As some will have noticed on my previous post my imac crashed and has gone off to be looked at, I always ran back ups daily on my work and now I need to access some photo's for clients on my daughters macbook. I have installed aperture on her computer and now need to find a way to get my aperture library off the back up ehd and get to the pics. I seem to only be able to reinstall the entire contents of my imac and not individual files etc. Does someone else know what I am doing wrong as I cannot figure out what it is I need to do if in fact I can do anything?

Don