Native Instruments Fx In Ableton Live 5 Options

[chagos]

I was wondering if any of you would care to explain how to use the N.I FX plugs in Ableton Live?

I understand how to use their normal plug ins, like "absynth" and "pro 53", but how do i use the "absynth FX," or "pro 53 FX" plug ins?
do i have to route them differently or do i have to have a midi note trigger them?

I ordered my Li ve 5 box, but have not received it yet, so I am still in the dark about a few things.

I looked on the N.I forum but could not find any specifics on this particular question.

thanks everyone