That would be easier than troubleshooting the ISO creation problem on the Vista system.

Either way, you would need the Vista 32bit network drivers in a non-exe format.  You need the .inf, .sys, and .cat files in a folder some place.

So you could put those files on the other system and build the custom disk.  When you get to the driver part of building the custom disk, delete every driver present and then add the Vista network driver.  When you get to the screen to enter the serial number you can enter the serial number of the other version of Ghost.

The only drivers you really need in the recovery enviroment are the hard drive controllers and network adapter.  I'm pretty sure the included hard drive controllers will work fine.

Dave