Good to know the idea wasn't completely useless(well for me it wouldn't be anyway, couse I learnt a few tricks doing it;P).

The 0x wasn't really any needed addition, I only made it like that soo people remember to put 0x before hexadecimal numbers to keep some standards;P. Hope you used a version that at least told you it's wrong;3, couse I updated that patcher at least like 3 times, the one that's there currently shouldn't have any bugs and should additionally show error message with some info to remind what wasn't set(in your case when you forgot to add 0x, it would tell you the problem lies in crc list).