Well - if you don't use uncracked game it wont install, so there is nothing to remove. Sadly i had to crack my dead space(i would bought ps3 vers but its nearly 2x more expansive than pc vers). try looking at torrent sites, reloaded, razor, avenged, hatred, hoodloom, unleashed are safe groups, watch out for skidrow - there are alot fakes. I know from expirience.
Also i prefer to play games with no-cd/no-dvd cracks because my dvd is occupied with metallica's cd(mostly "Kill 'em All") and i'm too lazy to change cds.