Similarly to searching specific message fields, if the Perytons™ Traffic-Generator Add-On is enabled, messages' content can be edited via a Script.
For modifying messages the following functions can be used (depending on the field type that needs to be changed, i.e. HEX LIST or VALUE):
bool packet.UpdateValue(string name, ulong newValue)
or
bool packet.UpdateValue(string name, byte[] newValue)
All options and operands used for searching messages (see par. 2.6) are valid for editing messages' content.