As far as I know the only possible way is by either using an emulator or getting a part of the IS DS Dev System: IS-NITRO-CAPTURE - http://www.intsys.co.jp/tools/nitro/capture/intro.html
Yeah I figured with the IS unit and emulator, was just hoping I was missing out on something ;P The guy that made the huge DS with the touch screens found a way to dump screenshots, but thats probably well beyond what Id need hah