To get Megafont:
http://www.hitsquad.com/smm/programs/Megafont/
http://www.geocities.com/lstnght2000/mf.htm
You have to get to the Editor - The blue icon brings up the tools menu (grey icon). Select editor. You will get 'choose mapping to edit' box.
Type in a name for the folder where the ins file will go. Select 'new mapping' off the files menu. Browse to the .sf2 file and select. Right click on the patches displayed and 'select all', then right click and attach the patches. Then, finally, you can pull down the Export menu and select the Cakewalk ins option. Megafont creates a melodic.ins and a drums.ins within a folder you named at the start, which is within a folder named 'megafont'.
Convoluted. Inconvenient. But, it works.