Need Help with Difficult Macro

Hey there,

I am new to excel macros, not new to excel. New system at work has ruined my system and until we get better software I drastically need help getting something up and running.

What I need:

If column P says "yes" I need an entire row inserted below.

I have $ amounts in column H and I. If column P had a yes I have to divide those into two and have it sum to equal the input. If column P did not have a yes than I need to do nothing with column H and I. Ideally the split would go into the new row that was inserted below.

Column H / Column I / Column P

$15.50 / $0.00 / Yes

$0.00 / $23.97 / Yes

$25.00 / $0.00 / No

Ideally would turn into:

Column H / Column I / Column P

$7.75 / $0.00 / Yes

$7.75 / $0.00 / Yes

$0.00 / $11.98 / Yes

$0.00 / $11.99 / Yes

$25.00 / $0.00 / No

Finally after that I need the following columns in those newly inserted row to copy the row above them, and only these columns:

If Cells(myRow, "B") = "" Then Cells(myRow, "B") = Cells(myRow - 1, "B")

If Cells(myRow, "C") = "" Then Cells(myRow, "C") = Cells(myRow - 1, "C")

If Cells(myRow, "D") = "" Then Cells(myRow, "D") = Cells(myRow - 1, "D")

If Cells(myRow, "E") = "" Then Cells(myRow, "E") = Cells(myRow - 1, "E")

If Cells(myRow, "F") = "" Then Cells(myRow, "F") = Cells(myRow - 1, "F")

If Cells(myRow, "G") = "" Then Cells(myRow, "G") = Cells(myRow - 1, "G")

If Cells(myRow, "J") = "" Then Cells(myRow, "J") = Cells(myRow - 1, "J")

If Cells(myRow, "K") = "" Then Cells(myRow, "K") = Cells(myRow - 1, "K")

If Cells(myRow, "L") = "" Then Cells(myRow, "L") = Cells(myRow - 1, "L")

If Cells(myRow, "M") = "" Then Cells(myRow, "M") = Cells(myRow - 1, "M")

If Cells(myRow, "N") = "" Then Cells(myRow, "N") = Cells(myRow - 1, "N")

If Cells(myRow, "O") = "" Then Cells(myRow, "O") = Cells(myRow - 1, "O")

If Cells(myRow, "P") = "" Then Cells(myRow, "P") = Cells(myRow - 1, "P")

If Cells(myRow, "Q") = "" Then Cells(myRow, "Q") = Cells(myRow - 1, "Q")

I feel like this is a tall order. I've been using two different macros to insert a row based off my Yes and then another to duplicate, you can see some of it above. But the macro I use for dividing to equal sum input is affection the entire column of H and I, not just the one that have a Yes. Pus it puts it in the column to the right instead of the empty cell below it. If this isn't possible I understand, but it would save me hours of time each week!