After you have made your source changes to # DB2ICOB, that are shop specfic, and then recompiling your #DB2ICOB, and creating an executable of TNMCDB2I using:
LINKAGE EDITOR CONTROL CARDS
INCLUDE SYSLIB(DSNELI)
ENTRY TNMCDB2I
NAME TNMCDB2I(R)
do a bind of the Package and a Bind of the Plan.
Copy your new TNMCDB2I module into your CAWLOAD, as when you do a CA D2 in the TDF, it will search your TNSYSLIB file at runtime.
Or if you created a separate Loadlib, you can concatenate your new loadlib to the ALLOC F(TNSYSLIB)