Copy and paste is the easiest thing in Putty! Just select anything and it is in your clipboard. To paste in Putty use Shift+Insert or just the right button of your mouse. So what are you talking about?
Also, I get complaints of my coworkers because I configure SecureCRT to behave like PuTTy, they say it's dangerous :-/
(I used to use Putty to check my email using mutt remotely when on vacation).