Well, a parametric EQ will let you alter both the frequency center as well as the "Q" width of the band. What this means is that you can change where the band affects, and also how wide of an area it affects, spreading out evenly from either sides of that center. I'm sure you know both of those though, otherwise you probably wouldn't have bought this unit
Anyway, if you fiddle with the Mark's EQ, you will see (hear) that each band bleeds into each other a bit, so this means that even if one band is at 0, if you crank the band beside it, you will get some boosting of tones that are normally found in the band that is parked at 0. So what this means is that each band has a fairly wide "Q" width. I'm not exactly sure what the Q stands for, or means, but I know that the lower its value, the WIDER its swath of effect. IE: a Q value of 0.1 will have a very broad boosting effect, whereas a Q value of 8 will have an EXTREMELY focused, narrow band of effect. In my experience with mixing, etc, good Q values to start with are usually 0.2 to 0.5. Obviously you can crank it up from there. I think Q values will max out at 12, which is basically an extremely precise notch-filter at the frequency you have specified. Using very high Q values is not recommended, especially on a 5-band EQ.
So anyway... I would say, set your frequencies to the ones that are written on the Mark (80, 240, 750, 2200, 6600), and then from there, set the Qs so they are progressively wider as you go up. Maybe something like this, starting at 80: 0.5, 0.45, 0.4, 0.3, 0.2. Try that out, and see how it sounds. As for how much to boost... I don't know what the range of boosting is on the Mark's EQ, I would guess somewhere between 6-10dB, so try those ranges.
