Yes, you first download the ISO and extract its contents or more simply, mount the ISO in a virtual drive. The directions in that guide are pretty clear but perhaps too specific so the overall idea behind the process is not obvious.
What you are doing is copying some of the DVD9's VOB files to a new DVD5 image. If a VOB is too large, you blank the latter parts (cells) of that VOB so it does fit. On the second disc, you blank the cells that did fit on the first disc and copy over the remaining cells (i.e., the ones that you had to blank for the first disc). Presto, you have split that VOB across two single-layer DVDs. I prefer this manual process over software that does it automatically because I have control over where the split happens. And this software is FREE
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The guide also mentions PGCEdit which is another FREE piece of software that lets you edit the underlying structure of a DVD. I use it to tweak the structure of the DVDs that my combo VCR/DVD burner creates (I delete the menus, previews, etc.). PGCEdit is more complex to use than VobBlanker but that's to be expected because it has a more complex to perform
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