msr986 - 7:51 am on Feb 5, 2003 (gmt 0)
My O7 installed itself in a new directory named Opera7 (make sure it installs in a directory named Opera7, to keep your old version intact). You can run O7 and earlier versions on the same machine. The only installation trouble I have heard about was installing O7 final over O7 beta. This required a clean install.