Yes exactly. You can download the ISO file, which is a bit copy of the BW10 DVD, or rather the jump drive that you keep referring to.
The thing is that I suppose some degree of computer literacy. From the Mac OS system point of view, it is completely irrelevant, whether you connect a physical DVD drive, physical flash (jump) drive of an ISO/IMG/DMG file. So that's why I didn't even mention this too, because it doesn't matter at all, you just need to connect it, whatever you have. However, if I'm too optimistic, don't feel bad, just ask.