There is no way practical way to do the swap . The plasma uses Pilot start but needs to cut in HF . And of course HF starts Tig.
The 205 still needs HF to start Arc on tig but it uses a continous Blow back torch with no HF , To change the process even for the plasma means redesining not only the Plasma board but the Main control board so while it is theoretically possible it is no where near practical.
However shielding the cables is something that you may wish to explore.