Need a Macro plz !

[geophysicist]

I have about 5000 rows of data
I must insert nine blank rows between each two rows
this is the easy part till now....
then i want to fill these nine blank rows with series (linear-trend)

the problem that I want to fill each nine blank rows
seprately...because when i fill all the blank rows... they change the
values in the original rows !!!

im trying to interpolate values (the nine blank rows) between the
two original rows ....mainly i have X & Y values along with other
values but i need interpolation only for the X & Y .

this is the code i used to insert the blank 9 rows...i wish any one can complete it concerning teh filling values issue

Option Explicit
Sub InsertBlankRows()
Application.ScreenUpdating = False
Dim numRows As Integer
Dim r As Long
Dim Rng As Range
Dim lastrw As Long
numRows = InputBox("How many Rows")
lastrw = Cells(Rows.Count, "A").End(xlUp).Row
Set Rng = Range(Cells(1, "A"), Cells(lastrw, "A"))
   For r = Rng.Rows.Count To 1 Step -1
       Rng.Rows(r + 1).Resize(numRows).EntireRow.Insert
   Next r
Application.ScreenUpdating = True
End Sub

you can look at this screenprint ... i think it explian


http://img436.imageshack.us/img436/1491/excel1vq.jpg


http://img436.imageshack.us/my.php?image=excel1vq.jpg