Ok.....did you get it out of bootloader? Here is a thread
http://forum.ppcgeeks.com/showthread...xit+bootloader
which says that you have to have active sync turned off......
Did you ever get your phone actually unlocked? If Olipro didnt work for you try the Nuespl SD card method outlined by GaMedic here:
http://forum.ppcgeeks.com//showthread.php?t=33857
He outlines how to use SD to unlock the phone....
When you finally get the phone successfully flashed you will have to go by Cricket (or maybe call them) so that their system recognizes your phone (probably needing the ESN)......Since you are flashing a phone that did not come from them, they will probably need some information to activate it
HTH