Hi JonDoe321,
To deploy the Operation System using RIS, you will have to create an image to be used with RIS installation on client computers.
According to your post, you already have an ISO image of the operating system, please burn the ISO image as a CD or DVD and insert it to your CD/DVD drive. You may also use some
other third party
tools to mount the ISO image to the CD/DVD drive.
Then you can use RISetup wizard on the RIS server to create a CD-type image, which is also called a flat image. After you’ve created the OS image on RIS server,
you can boot the client with PXE boot enabled and press F12 to choose the image you’ve created from the RIS server to be installed on your client computer.
For more information of Remote Installation Service, please refer to the link below
http://technet.microsoft.com/en-us/library/cc786442(WS.10).aspx
How To Use Remote Installation Service to Install Windows Server 2003 on Remote Computers:
http://support.microsoft.com/default.aspx/kb/325862?p=1
This posting is provided "AS IS" with no warranties, and confers no rights.