fcopy: Copy newer files only

[Andreas Heinlein]

Hello,

is there any way to make fcopy compare files only based on metadata 
(namely mtime)? The reason is we are using fcopy to copy several huge 
files (VirtualBox Disk Images) in softupdate mode, which of course takes 
ages every time a softupdate is run, even though the file has not 
changed. I read about the -P option in the manpage but don't understand 
how it works. Could someone give me an explanation?

Thanks,
Andreas