Update/Delete/Insert a new record in Multiply tables

Question

I have 5 tables in my database

1.Grp   2. Mod      3.Fun     4.Grp_Mod  5.Grp_Mod_Fun
GId      MId           FId       GId            GId  
GNm    MNm          FNm      MId            MId    
DT       DT            DT        DT             FId

I have a list of Grp Nm
I have a list of Mod MNm
I have a list of Fun FNm

From the Grp table A GNm have to have a MNm/MId and FNm/FId asign to it.

Grp table primary key(GId) is referenced in Grp_Mod and Grp_Mod_Fun
Mod table primary key(MId) is referenced in Grp_Mod 
Fun table primary key(Fid) is referenced in Grp_Mod_Fun

I have multiply GNm,MNm and FNm in each of their tables and all their Id's are referenced in the Grp_Mod_Fun.

If I want to insert a new MId and FId to a GNm base on the GId from Grp_Mod and Grp_Mod_Fun tables how do I write the sql statement for that.

Same for Update and delete.

Thanks John