I regularly make reporting sheets and begin with a number of single rows.  
Under those rows I need to insert 2 more rows (1 at height 55 and one at
12.75) . Each of the two rows are merged into one column each.

Currently, I first go down the pages inserting two rows under each entry
then copy and paste the two rows required into the two blamk rows I have
previously inserted.

As each report has between 200 and 500 single entries, this is a very
tedious way of going about the task.

Is there any way I can select the two rows I want and have them
automatically inserted under each entry.

example
START WITH THIS
1234    abcd    hgghtgsf    jushsydr    kkkkk     hystvgdvbnbdfndn
2536    djnfc    djsiufdn     mmhbgu   mjkh      mjghb,dsfkbdbfvdj
5342    dhdh    hfdhdfg     hdhjghgs   hdgd      dhshgtdhvdsyhghs

END UP WITH THIS
1234    abcd    hgghtgsf    jushsydr    kkkkk     hystvgdvbnbdfndn
--------------------------------------------------------------------------
_____________________________________________________
_____________________________________________________
2536    djnfc    djsiufdn     mmhbgu   mjkh      mjghb,dsfkbdbfvdj
--------------------------------------------------------------------------
_____________________________________________________
_____________________________________________________

5342    dhdh    hfdhdfg     hdhjghgs   hdgd      dhshgtdhvdsyhghs
--------------------------------------------------------------------------
_____________________________________________________
_____________________________________________________

Any help would be appreciated.

Thank you