Questios regarding ficm form fillout

[HP MACHINE]

Hello , i have a couple of questions

#1 - the form is asking for my existing ficm ,ecm strategies
which i do not know .
There is no way on god's green earth my truck is
entering a dealership . If i order the ficm programmer
with the ecm & egr rollback included will it matter ?
( my truck is a 2004.5 - build date 03/04.).
I'm assuming that you have ultimate strategies
that work .
#2 - if i had to change the ficm at a later date , can i
re flash it also ?
#3 - the form also asks about exhaust size , as of now
it is stock , but i plan on installing a 4 or 5 inch
in the near future .
Should this be done before performing the ficm
/ ecm update , or can i install it later ?

Thank you ( sorry for being long winded )