call scu3 program through submit

Hello team,

I have a custom program selection screen. The requirement is to call my programs selection screen and the displayed output has to be from scu3 program.

for this : I am capturing all my selection screen values in an itab of type rsparams.

submit <pgm_name>with selection-table <itab> and return.

I face 2 problems:

1. the output screen of the value is different from my selection screen. How can I add material number or bypass those values ? submit with anyother syntax will work?