The 2003-2005 Dodge Cummins SCI based PCM's are supported by HP Tuners as write only controllers. When you perform a "read", a stock file of the latest OS version is generated for you with information specific to your vehicle. You are prompted with this dialog:

Write Only.jpg

After clicking OK, you are then prompted to save this file. This read file must be licensed and used for any further writes to your module. Do not license a read from the repository or any other source. Once you're ready to write your module, this generated file will overwrite any pre-existing software and tunes in the module, upgrade it to the latest OS and apply any changes you have made to your .hpt file.