Altiris reimaging with CD Support

Hi
we are using Deployment solution 6.8 sp2 and it is working well for us. We look after about 400+ computers all over the country on (effectively) a WAN. So visiting the machines is not an option, and bandwith to each location is limited, so imaging over the network is not an option, so have created a solution where I can have a NAS on site, and reimage the computers with the aid of Bootworks (DOS) and it calls the image from a mapped drive to the local NAS, all good so far.
BUT...this solution is expensive when we need to role this out to over 100 sites with a NAS costing $200 each.
So, I want to put the image onto (many) a DVD and post them to location. When DVD is in drive I want to boot into bootworks and it run the rdeployt.exe command pointing to the local DVD drive for the location of the image. Once its imaged it will talk back to the remote deployment server.

What I am having trouble with, is creating a bootworks installer with the UDIS (Universal network driver) that provides support for the DVD drive. (HP 7800 SFF computer)

I can add individual files to this package, but unable to get the package to select (or see) the universal network driver (as it does in PXE) and also get it to install the DVD drive.

There is already a package called "CD Support" but this does not use the correct network driver, nor does it install a CD drive.

any help would be greatful.

g