Systems Deployment

Right now I use RIS to deploy my Win2k Sp4 image to my clients. It has all the mandatory patches also slipstreamed into it (blaster, sasser etc). As of right now, when we rebuild a machine, we require our Ris servers to place the machine into a defaut OU so we can install the home made IE 6 group Policy (software distribution). Once it has installed then we must move it to it's final resting place in Active Directory. I need to find a way to cut this step out, the only way i can see this working is if I add IE 6 to my I386 flat file. I have found no way at all to integrate IE 6 SP1 into a Windows 2000 installation. The only other way I can think of to do this is to use the [GUIRUNONCE] section of the unattend.sif file. This would allow me to run the current installer I have, but what it also would require is for me to add the local admin password to the sif file which if you use autologon in the [GUIRUNONCE] section is copied to the workstation and cache in a non encrypted state, that is not acceptable. So I have come to my conclusion, why not slipstream it in, why else did M$ add this feature to the I386 flat file structure. So I beg, has anyone managed to do this, or find a way to do it?