You mean when you reply, have a quote of what they said in the message? Because you can do that by clicking the quote button instead of reply button. ^_^
[edit] nvm, I get what you meant. XD
you could always do what Hiroku does.
I think he means like how when you post in a thread you can see the past posts at the bottom? So like. . . you dont end up with twenty quotes taking up space. . .