"Skweeker" Mod question

I just did the "skweeker" high idle mod to my 03 f-250 today and it works awesome. I'm just curious what will happen if I have the switch turned on when the truck goes into it's normal high idle mode that it came from the factory with. the only reason i did the mod is because the factory high idle takes a long time to "kick in", sometimes if not cold enough it won't go at all, with the "skweeker" mod it will high idle right away.

Can you explain just a little about this mod?? This is the first time I've heard of it?

it allows you to put your truck into high idle with the flip of a switch. it bumps your idle up to 1200rpm. here is a link that puts it into better words than i can.
http://www.superdutydiesel.com/forums/showthread.php?t=532

Your high idle mod will just override the factory high idle and stay at 1200 untill you turn off the switch or press the brake.

I see, thank you Centennial.