Yep. Lemmy did what he did by sending as hot a signal as he could from his Ric, through extreme EQ'ing into custom Marshall tube heads and cabs. I don't think he ever used pedals much, if at all. On the EQ, he would dime the gain and mids, turn down the bass and treble, and crank everything on his Ric all the way, so he had this huge grinding mids tone that I can only imagine must have been pretty rough on his tubes and speakers.
You can get a taste of what he did here:
That said, you can certainly use dirt pedals to achieve a similar sonic effect. Which is what most people do, since a gear setup even approximately like Lemmy's would cost as much as a car. That pedal you have is meant to emulate the Marshall sound, so you should be able to find something reasonably close out of it. As I recall, Lemmy's custom heads were based on JCM heads, so I'd start with the "JCM 800" setting from the manual and work from there. Hope that helps.