This is about as complete a reference site as you will find for FPX on Apache:
http://www.joshie.com/projects/apache-frontpage/Be aware that FPX on your e-smith box will require opening up permissions, and likely compromise the SME security standards significantly. I wouldn't recommend you use the extensions on a box that is needed for other things --- but only as a DMZ-type server, that can be sacrificed to a determined hacker without exposing your internal network. I definitely would caution against using an FPX-equipped box as your primary gateway.
As far as ASP on Apache --- um, have you heard of PHP?

Dan