Once you know about extracting and repackaging a standard 3DS application, it's easy ~The funny named file in the "rom" folder is (for GB/C games) just a renamed standard GBC rom;then you may need to adjust the patches (found in the root of the romfs with the same name as the game's rom), if code/data modified by the patch file in the original game was moved around - which is quite hard to say if you didn't make the hack completely by yourself...then the icon/banner (found in the exefs) ought to be edited (you can just rip them off the one you made with the injector)then titleid (byteswapped) ought to be changed, it's found in both header and exheader (twice); while you're there, change the uniqueid (ctr-n-xxxx) found in the header to anything you want, you have 15 characters to express yourself, no need to stick to the original format and add confusion...then just reassemble the whole package, install it, and laugh at whatever error everyone's going to make the first time they try