I suspect there is a disconnect between the question andru is answering and the one mjsto is asking. (Andru's answer on how to download is correct, but I don't think mjsto knows what he's asking quite)
What LePou offers are amplifier and cabinet
simulation plugins. i.e. if you run a DI guitar signal through the Hybrit plugin, it will then sound much the same way it would if you'd run the guitar to a knock-off Marshall amplifier and then recorded the direct signal from that.
Then, when you add the cab plugin, it will sound much the way it would if you'd run that signal into a speaker and then mic'd it according to your impulse files.
So if you're looking to add distortion to your signal, that may or may not be the way to do it. It's kind of inefficient and changes your tone in a lot of other ways.
If you're looking to emulate an amplifier signal chain, the LePou plugins are pretty good. I've used them on several projects, altho, I usually use the
Nadir cab instead of LePou's because the latter has sometimes crashed for me