conjure with

 I am still trying to conjure with one of Darren MacWarren's soap characters, Father Roger.

 It's a movie review introducing Darren MacWarren played by Jason Gann. MacWarren is a TV soap actor in the movie. 

 conjure up: chiefly British : to treat or regard as important <Victor Hugo is a name to conjure with.>

 That is the only entry for conjure with in the dictionary. 

What does it mean in the sentence?

Thanks.  

Is it possible this is an Australianism (for lack of a better word)? Given the context I agree with optilang's interpretation but I've never heard this particular formulation before.

The reason I suggested an Australian connection is that the Web site this comes from is Australian and the movie being reviewed is Australian. Here is the link if anyone is interested.
http://www.abc.net.au/rn/movietime/stories/2008/2243636.htm

How about "come to grips with" as an alternative expression? A quote from the review in question: "I am still trying to [come to grips with] conjure with one of Darren MacWarren's soap characters, Father Roger. He wears a dog collar and a moustache and we see him only in brief clips."

Thanks