I originally posted this message just before P5 was released. Now that I've received my P5 I think I'll try to ask it again with some clarification. Once P5 is deleted what files may be safely deleted from P4 if I only wish to run P5? The kind answer I received indicated that I could delete anything but the Runtime directory and be okay. Now that I've received P5 and played with it a little I think that many things in the P4 Runtime directory are also included in P5. Since harddisk space is at a premium for me (and perhaps others) does anyone have a list of P4 Runtime files that may be safely deleted because P5 includes those files too?