code in enhancement

hi,

i have a program RVTPSC00 from where the FM IDOC_OUTPUT_TPSDLS is called. From there an include LV56IF2D is called.

i am extending the idoc with some segments and want to populate the data in these segments before idoc is sent as outbound. this code was previously existing in an user exit named EXIT_SAPLV56I_004. but now i want to get rid of the user exit and include it based on the enhancement concept framework. any sugegstions how and where to do this ?

thks