Question about saving a character preset

Mythcons

Greetings,

Quick question about saving a character preset: Can you adjust weight maps for a Genesis character (for example) and include them in a character preset. Obviously you would not want to modify the base Genesis content, but if you could load data into the character, that would be beneficial with regards to character design. What are the limitations of what you can do to a Genesis or DAZ original model, legally and technically?