Can someone knowledgeable take a look at this photo of the headset on my 2005 Trek L300 bike and verify that it is an integrated headset? From Sheldon's page http://www.sheldonbrown.com/headsets.html my understanding is that since the cartridge bearings are inside rather than on top of the frame walls, that means it's integrated.

I was intending on replacing the threaded 1 1/8"suspension fork with a threadless carbon fork by replacing the headset and stem with threadless. But now that I see I have an integrated headset, that means I cannot replace the headset, right?

So given that threaded 1 1/8" forks are very rare, and I need a rather specialized sort of fork (cyclocross style for 700c with canti bosses), I think the likelihood of finding such a fork is essentially nil.

I have backordered a threadless Nashbar NS-CYF Carbon fork for $120, and I'd like to install that. It sounds like my best option is to bring the fork into my LBS, and have them cut threads in it. Then I leave my headset alone. Does that sound best?