if i open a fallout3 mod in fo3EDIT i can just change the file header from fallout3.esm to falloutnv.esm and copy the esp to falloutnv data folder and the mod works. i have both games installed. if you open fallout3.esm in GECK and mod quest and objects, change a value and change it back, so GECK thinks that youve edited them but its still same. and save esp. then open esp in fo3EDIT and then change the file header from fallout3.esm to falloutnv.esm. so what your trying to do is copy quest and object from the fallout3.esm and put them into an esp. change the file header so it can be used in falloutnv might be a way to transfer stuff from fallout3 to falloutnv and once you have changed the file header for the mod, the mod can then be opened in fallounv GECK and for legal issues, if you edit any fallout3.esm stuff and release it on fallout3 nexus. then it shouldnt be a problem? and give instructions on how to copy it to NV directory.