the thing people neglect to say here is:
it is more expensive to pay someone to mod your XB, BUT if you frell it away yourself, then that $150 XB and/or $65 X3 chip just got flushed down the toilet and thats more expensive then paying someone else. other thing is if you pay someone else to do it, if they frell it away, then they have to pay for it.
IMO, someone that has no experience with microelectronics should by no means take on a task such as this without accepting the consequences of a botched mod. do it yourself, you take the risk, you eat the bill. dont come back crying that Xecuter sucks because you f***** up.