2004 mustang bypass

hey there folks... i am about to install a remote starter in my friends 04 mustang, i have worked in a shop environment before where i had all documentation necessary but thats not the case this time. i have alldata so i am not worried about the wiring, in fact i have that down. my question pertains to the immobilizer bypass. i am trying to save her some money, and i found the 555fw on amazon for less than $20 shipped. she does not currently have a second key for the car. my question is this: the 555fw most everywhere online says it requires 2 keys to program: is this 100%? what is the programming process? if she has to buy a second key, how much is that going to cost her? because if she has to buy a second key regardless, then i could just rig up the bypass using a relay, right? any input would be greatly appreciated! thanks!

All bypass modules will require two keys to program for that year Mustang. The programming sequence requires two active keys to be available to start the code learn process of the PATS module. Most Ford dealers up here charge $ 60 to program and cut a key.Jeff

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