Wil,
Get with the program ;-) Buy a region free DVD player for $100... Mine plays all those Duke videos from the UK in PAL/SECAM/NTSC without breaking a sweat. It's an upsampling OPPO unit.. $150 last year, I imagine it's less now ! I wish I could help you with 2005 - I have 2006 though !!!
Plan B: your PC will probably play them, and if you have a some software, you can convert to NTSC and burn yourself a copy for your TV.
Edit: By the way, I will look tonight, I think my Mac's Idvd can convert them, if so I will burn you 2006 - though I have no way to test it since all my DVD players are multi-region-format ! ;-) You've certainly helped me enough when it comes to porsches ;-)
Berretta fan:
http://www.dukevideo.com