I mostly understand the whole 4.3 GB fitting on a 4.7 GB DVD. My question is:

Does that mean the ISO has to be less than 4.3 GB or the final written files must total less than 4.3 GB?

If it is the latter, is there a way to figure out how much an ISO yields without unpacking the whole thing?

Thanks

wtf are you talking about?

ive made an ISO and burned it to DVD that was 4.6 gig...

Not too sure about the numbesrs, but this should give you a good idea.

Most computer product sizes are calculated that 1gb = 1 000 000 000 bytes

Windows sees that 1gb = 1 073 741 824 bytes

How much the ISO contains is the size of the ISO...

Easiest way - try to burn it in Nero/RNM. If the files are too big, I think the programs are smart enough to not burn them.