need help flashing xbr on jasper 512

[nicomic]

hello, i don't know how to remap my bad blocks on jasper 512
when i flash back the orig.bin it works but it's impossible to flash xbr or xell
i have 2 bad blocks : 48 and E18
i've tried to erase them a lot of time but it always give me errors, i'd like to remap bad blocks to flash xbr but i don't know where to put my blocks and which command must i use?
thank you very much!

[ReverseAffect]

wrong place noob....you have 15 posts.would of though you would know better....