Applying Instrument Tracks to Reg. Audio Tracks

[d00m1001]

Hi, this might be a weird question but, one of my plugins (Effectrix amoung others) can only be accessed when I'm on an instrument track yet, the plugin really isn't a virutal instrument, it's more like an effect that should be able to be applied to audio that I record.

Is there any way to re classify the plugin to show up under the inserts on an Audio track?

Also, is there anyway to make it so that the effect only lasts for a certain amount of time before stopping (and maybe coming back in later)?

Thanks! Here's some general info of what I'm using

Pro Tools LE 8
Mac OSX 10.5
MBox Mini

Thanks in advance.