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:
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.