Standard F4_help filtering (Is it possible)

Hi,

I am having one requirement, ie, I open the tcode FS00(please have a look on attached image.) , here Gl account one field is available.Beside to that f4_help is available if i press the f4_help all the Gl-accounts will be display. Now what i want is i would like to filter the f4_values i need to remove one Gl from the F4_help. Is it possible. I worked on customized report. But standard i never worked. I don't want to add validation before doing the task.

I need to filter the f4_help(Just remove one Gl from the F4_help).

Has any body faced this type of requirement, I need your valuable suggestions.