Hi again, sorry for replying so late, life got in the way and my project got put on the back-burner.
I've opened up my donor NDS Lite and noticed too that my board didn't look anything like the example board.
Thanks nEoVaLoR, for the generous offer of helping me out and if you're still up for it: I found 2 likely candidates to take my power and ground from. I just need you to confirm if I chose the right ones.
This is an overview, I've marked 1 for the positive and 2 for the ground. next two pictures is a close up of each.
The positive 3,3v:
The ground:
Am I right in my assumptions?