"I guess there's a way to reset the original Joint Parameters" You can make a pz2 to restore the original Joint Parameters. One way to do this is to make template pz2 file listing all the actors, and including a 'channels' section for each, then use Morph Manager 4 to copy all the Joint Parameter channels from the cr2 into the template. First you need to load a pz2 (any pz2) into the same Morph Manager window you will use load the cr2 into, this forces MM4 to display all channels, if you don't load a pz2 first it will only display morph channels. Here is a snippet from a pz2 template to show you the format, don't forget to add a closing brace to the end of the file.

{
version
    {
    number 
    }

actor BODY
    {
    channels
        {

        }
    }
actor hip
    {
    channels
        {

        }
    }
actor lToe
    {
     channels
        {

        }
    }
}