need help again,please

which programm is the for copying psx games? does cloneCD work?
Which mod chip is the best? Which (sorry, i don´t know the word) parameters on which programm do i have to turn on?
I heard that cloneCD makes a 1:1 copy of any game so why do i need a patch? And what´s the swap trick? Never heard of it.
Do games work without a patch?
Which CDR do i have to use, 650 MB or 700 MB?
I know this are many questions but i hope that someone has time to answer them.
Thanks for your answers (i hope i get some).