Crash course on how to set up GNU screen (primarily for @Crystal but maybe useful for others???)
When you first start up, instead of just immediately starting irssi or whatever, run screen.
It'll give a welcome screen, just press Enter or whatever.
When you're in screen, you can type, say, screen irssi, and it'll run irssi in a new screen window.
To actually do things in screen, you press Control-A and then a letter or whatever. Doing it with a number will send you to that number window. Left and right will send you left and right. Pressing control-A again will send you to the last window, a harmless thing if you forget whether or not you pressed control-A.
Pressing d after control-A will detach your screen window, which means it'll be saved even though you're not looking at it. If you've detached screen, or PuTTY died because it lost your connection, you can type in screen -x and it'll bring back your detached shit.
This is probably not that different from a bunch of other GNU screen tutorials and shit but w/e.
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not that I think I have any reason to use it for anything