Advice to beat the 5

I'm a newbie to all of this, so please excuse if this is the wrong question to ask.
If you couldn't tinker yourself - at all, and you wanted your GT with a auto tranny to do 0-60 in under 5 sec, say 4.5 and keep good passing power (on or around 45-70) without loosing range (MPG) - what mods would you need and would you trust a dealer to go them? Would it be a Vortech+Magnaflow combo?

Input would be appreciated..

Douglas

More questions..

Thanks for holding on thee flames..

What is a 4.10? Good rubber goes without saying, but I am talking a auto-tranny - this still can be done? Beat a BMW M-series off the line (It has a button for "Launch Mode") if I remember correctly. We have such curvey roads in Norway that top speed isn't a question.

I saw the "drift" Stang on Toyosweeps.com - might as well enter... With the Eibach springs, but isn't speedbumps a concern?

D