Purchase Order printing Problem

Hi Friends,

I am working on PURCHASE ORDER PRINTING.

There are four window

1) Header window - It contain address of vender and plant. It also contain PO no. date and etc.

2) Main Window - It contain all detail for Line Item of corresponding PO, with qty.price etc

3) Tax window- Here I calculate and print taxes , payment tearms and some header text.

4) Footer window- It contain signature and name .

Problem -

1) I want to print header text in 3rd windo having 15 to 20 line , but size of window is small so PO doesn't get printed.

2) My client want to print max no. of line item in first pages.

They want to print all remaing of PO after all line Item

So please healp me to solve these problem.