You would need to make a custom boot disk that had the rdeploy files on it.  You might want to try the stand alone boot cd (I haven't tried one of these) and it might contain the imaging files you need to be able to use Rdeploy.  If you dont use an Altiris/Symantec create boot disk, just make sure you put the rdeploy files on it so that you can use Rdeploy. 

You probably don't want the image just sitting out there on a local drive where anyone can see and access it. I think the boot CD\DVD with the image on it would be the best thing. If you make the image an .exe you won't need the rdeploy files, just a bootable CD\DVD and the image file.

I installed WinPE on an extra partition on my drive. Inside WinPE I have it scripted to format what will become the c:\ drive and it drops the image on to the C:\ partition. I use the calcs command to prevent people from accessing the image. It works well.