Table Maintenance Generator for /SAPSRM/SC_TP

Hi,

The customer wants to maintain the entries directly in table /SAPSRM/SC_TP, but there is no Table Maintenance View available. We tried to create Table Maintenance Generator, but it is restricting to provide Function Group with prefix /SAPSRM/

How do we create Table Maintenance Generator with custom Z function Group?

Thanks,

Prabhakar