I do it (not the same, but "my way") using a tuning capo (a Scott or a Third Hand). Or there is a cut-off shubb that will do the same but just for teh mock DADGAD. Put the guitar in standard. (EADGBE)Use capo on teh ADG strings at the second fret. You now have EBEABE (or DADGAD one tone up).

Fret the A with your second finger to make a B note. You now have an E-ish two note chord (dyad).

Mentally picture the rhythm (in that dyad).

I was born a ..

Just as you start the word "lady", fret teh middle "E" string (as it now is) at F sharp using first finger, pull off, fret the lower B string (as it now is) at D using ring finger and as the word "fair" starts, go back to that E-ish dyad. Your second fnger had not moved yet!

Second line, keep that second finger there!

Fath(C sharp, ist finger) er's chief (D, ring finger) and (the dyad)
on (D) ly (Csharp) heir (pull off in the middle of the word to revert to the dyad

And whenmy good old fa (F sharp) ther (dyad) died (first finger on ther (dyad) then put first finger where the second was and put the ring (on the middle E (as it now is) string at G sharp

I (on the dyad) was made a (copy the notes of the end of the first line over thw words) young knight's bride


Then I keep that rhythm going throughout as if I were laying a modern dance tune, and just alter weight and voice for teh story.

I have cut it down to 19 verses though! It makes it really easy - I'm a crap guitarist but this way it sounds half decent and fools people who are not watching.