mlpa ?

So, what if you dont' have Navonics... What is the best way to put in the coordinates and can you draw the lines in on a normal Lowrance GPS FF?  I did this on my Eagle Cuda 350 from what I can recall. 

On my old Lowrance M68C (which did not accept chart chips), I just input the MLPA coordinates & marked them all as 'red flag' waypoints until I accidentally did a 'hard reset' & erased them one day on the water.  Ooops.

That's how I did it back in the day...look up the gps # here: http://www.dfg.ca.gov/marine/mpa/ccmpas_list.asp
Then turn on my FF and move the cursor to each MPA corner and place a skull & crossbones icon. I couldn't draw lines to connect the corners but it worked good enough.