Adding to existing macro, update value in inserted rows

Please help I have a macro in my worksheet that looks at column K2:K1000 and based on the value in that cell it copies the entire row and inserts that many rows minus 1 and pastes the data into those new rows that part works like a charm. What I need help with is column J2:J1000 I want to be able to add text to the end of cells in column J if the value is 3 for example when the macro is finished running I will have 3 rows and column J will have 3 cells that show Z2:WM:MASTER_DATA now if the value in K2:K1000 equals 3 then I want the cells to change to Z2:WM:MASTER_DATA:Mad , Z2:WM:MASTER_DATA:STL and Z2:WM:MASTER_FLD. I will also have a value of 2 & 5 in column K2:K1000 and I will want to do the same thing to them. I hope I have explained my situation ok. Any help would be greatly appreciated!! Below is my code for the copying of new rows and data along with an attachment of my worksheet everything is on sheet2. Thanks you!

Sub InsertRow_By_K_Value()
'Determine last Row with data in Column K
  lastRw = Cells(Rows.Count, "K").End(xlDown).Row
'Loop through rows in reverse order
    For rw = lastRw To 2 Step -2
'If Column K > 0, insert Rows and copy data
     If Cells(rw, "K") > 0 Then
            For newRw = 1 To Cells(rw, "K") - 1
'Insert/Copy rows
         Cells(rw, "K").EntireRow.Copy
         Cells(rw, "K").EntireRow.Insert shift:=xlDown
       Next
     End If
    Next

End Sub