Question about modifying a performance tune?

[pcguy760]

If I modified the tire size on the "87 Octane Performance" tune, does it still install the actual original 87 Oct. Performance tune WITH the modified tire size? OR do I have to type in all the other parameters as well?

[06MonteSS]

if you select 87 octane tune, then modify tune, then make your changes and save them, then let it install the tune, it will install the diablo 87 octane tune with those adjustments that you made when you modified it..