Here's my updated patch. I think this attempt is better than the first, 
if you still find something annoying i will fix/change it.

This patch add some command line options to cp:
-b    make backup if file exists
-n    no clobber
-v    be verbose
-u    overwrite if source is newer than destintation file

I also tried to add "-i" (interactive), but i still need to figure out 
how to ask for just one keypress (y/n) without pressing return... 
Everything for that is prepared, in usage-text -i is commented out.

Hope you like this,
Nils