My bad, I did not give your numbers that good of a look and saw that yes your segments do add up to 5.17GB of an ISO. In short, no ImgBurn does not do what you describe. This is called spanning, and while it is a nifty feature... it is not included in this version of ImgBurn.
And I believe I confused you before. Further explanation, if it is needed, is below. If not, skip the quote and go to the solution.
QUOTE
(i) ImgBurn does not have a function to span files across into two separate ISOs... this would be nice. The split I was referring to was the fact that a FAT32 system cannot have files larger than 4GB. (ii) What ImgBurn does is split a single ISO image into multiple parts for burning. Does the difference between (i) and (ii) make sense? In (i) you have multiple ISOs ready for burning, which is not happening, and in (ii) you have multiple files (I00 and a I01) which represent a single ISO. Why ImgBurn is splitting the image on a drive with the NTFS confuses me @_@ and makes me ask you to double check what drive you are creating it to. You are using ImgBurn version 2.3.2.0 from Lightning UK?
When you load the I00, ImgBurn does not recognize that as an ISO image file, just your garden-variety file that will not fit on the ISO9660 (+UDF +Joliet) filesystem of the DVD.
A simple test to confirm this: load all 5.17GB of RAR archive parts into ImgBurn again, but look at the information tab, hit the calculate button.
For instance, I loaded 13GB of my Rock archive and it tells me under "Min. Req. Media" that I need a BR-R/RE (one of those Blue Ray discs) or an HD-DVD (high definition DVD).
Loading roughly 5GB of files into ImgBurn and the minimum required media for this: a dual layer DVD (DVD+/-R DL).
That is where the problem is coming from. It might be a drag that you have span the files/folders yourself. For some reason,
the author of ImgBurn is not interested in spanning...