Large ISO from Dual Layer DVD freezes

[bryworth]

Using DVD Decrypter I made a large ISO of a Dual Layer DVD.
Unlike a smaller ISO I made from a smaller film the bigger one tries to start but then it stops playing in PowerDVD.It seems that the hard drive is looking for data as the drive light stays on.
I notice that PowerDVD in file mode only shows the larger ISO as the same size as the smaller ISO at 4Gb although windows explorer shows it as 6Gb.
This file also freezes in Windows Media Player.
I have tried defragging the drive but this file was not defragged.
I have now made a smaller authored backup with DVD Shrink but is this the only way out? I was hoping to have a set of ISOs rather than a mixture of ISOs and compressed titles.

[steveryan]

Why create an ISO that size if you couldn't burn it anyway? Use DVD Decrypter in file mode and rip all the files.