If your corner jig is an L shape that is 1.5" thick (like in the quick start file). All you have to do is c3 to go to 0,0 after that move y and x to 1.5 (mx,1.5 my,1.5) then hit z2.
Now yo are zeroed at the corner of the jig.
As far as the dowl jig they just give you the file and you cut it yourself. It works ok but you will soon find you hate it amd make one that fits your needs better.
Kyle Stapleton
River Falls Renaissance Academy
Math/Technology Education Teacher
PRS Alpha 96x60 2.2 hp spindle, Double Air drills, 6" indexer, Fein 5 zone vac table
Desktop w/spindle
Potter Pen
Aspire 8.5, Creo 3.0