I'm not too sure which is the valve cover breather. I thought it was the larger of the 2 which was only about 5-7" long... that went to the tube coming off the new intake. If the main tube in the following picture is the one your talking about... http://www.lightningmotorsports.com/.../prelude24.gif then I think I described it wrong.

I can't find a pic of a 4th gen lude engine... but mine is the F22, non-VTEC. It's a smaller hose that comes out the top of the intake, near where that other hose attaches... but on top. It goes behind the intake manifold. If I can get my roommates digital camera I'll take a pic to try and make sure I'm telling you the right thing. I'm probably wrong like usual though.

Anyway, I replaced it and everything seems to be going ok. I haven't noticed anything wrong.... yet.