Actually, G2 trailing arms fit into any 88-00 civic. They're the exact same shape and dimensions as the newer ones, just with a larger diameter trailing arm bushing. The fronts, however, wouldn't do the trick.

As for the install, assuming everything goes smoothly and you don't have any siezed bolts or anything, it should only take a few hours (3 if you don't get distracted and have good tools, 6 if you drink heavily through the whole install).

:edit: Oh yeah, and get a buddy to help you. It will make things much easier.