Archiving procedures

[There will be enough room in HEAVENS for all of US]

I am looking for a way of writing a script which will help archive old
accounts on BSD 4.3.

	1- extract users who haven't logged on since 1988---1991
	2- copy (not manually) all their directory into a temporary directory 
	  which in turn will be dumped on a tape.

I am looking for a one shot script. IF that is possible please respond
directly or post.