Welcome. Splitting the neck PU can be done, but it would not get you really closer to a DGT. The DGT and CU22 look a lot alike, but are not really the same beasts. Pickups are only a part of that equation. The dgt has more wood in the body (thicker) and if your CU22 has a wide thin neck, also the neck has quite a lot less thicknes. Both affect the overall vibe of that guitar.
Changing PUs to more DGT style output and character would help though if you want a kore DGTish guitar. However I have no idea what makes a DGT pickup a DGT pickup.