"All the information is available from within the threads to which you posted, threads referenced by those threads, or the wik"
...yes, I'm sure that it's on the internet somewhere.
actually it is right here on this board and on others too, if not under "multiple partition" then under "multi-partition".
for those who don't know what this refers to at all, it is a way to get Digic3 cameras to use the full capacity of cards larger than 4GB, which is the limit of Fat16 with 64k clusters.
beyond that if you are willing to copy a registry entry and then modify an inf file and install a 3rd party USB driver for your card reader, then you can get a full card >4GB to work on your digic3 camera, at least in xp. It does seem to be fairly-well documented, maybe even doable...haven't tried it myself...at the moment I'm happy using a 2GB card in my a650 and my 8GB card is in my G9. I spent some time testing this today, of course it is easier to just use the G9 and indeed it gives slightly better IQ, too, probably in some part because I can use Bibble Pro 4.9.9b to convert the raw image while I have to use dcraw to convert the raw files off the a650, and it comes down to the quality of the software used to post-process the files.
Plus I can't get any exif info out of dcraw, so that makes it more complex to do any noise-reduction on the raw output.
But
The files that I do get are much better than the camera jpegs.
...the two cameras have roughly the same noise characteristics but the G9 is much easier to work with, with chdk in this state.
...there is a narrow window where using CHDK with a 12MP p&s with IS that can shoot raw with chdk and is fast, clean, small and light enough to be an adequate DSLR substitute but is only a little more trouble and so much cheaper than a G9 or something that already shoots raw out of the store. That window is passing-by fairly quickly. To me raw shooting is the only feature that CHDK gives that makes it worth even messing with CHDK in the first place. The movies can be larger than 1GB? Great, who cares. The bracketing is useful but minor, the auto-ISO tuning is useful but minor. Who is going to go through all this just to get auto-ISO to work better on their camera, so they don't have to adjust it manually, unless it works perfectly and they never have to set the ISO manually again. Probably not happening here.
but I definitel have to applaud what has already happened. almost too little too late but still.