nrg.001

[Palmiro]

I've win98 se and Nero has created and image splitted in two files.First of 4g with nrg extension and second almost 4g with nrg.001
Because I would like to reduce dvd image erasing some files and burn on 4g dvd, I'm trying to open image with known utilities but many ones open only first file and when I extract files that are recorded on second file (nrg.001) they send me an error. Magiciso for example open nero image but only first 4g and not appends second file.
How I can solve this problem?By which utilities?
Thanks