tevia

I'm new to linux from windows and am clueless about how to set up applications. I've installed Mandrake 10.01 (I think!). I'm visually impaired and use a screen magnifier called zoomtext for windows. I've downloaded a number of magnifiers for linux - gnopernicus, k-mag, k-zoom and unwindows - but have no ides how to install them. I'm no computer boff either so someone please explain in simple english.