different shipping prices for different products

[jodia]

Hi

I need help with shipping costs - I have looked at a lot of threads but cant find what I need.

Info below of my version etc..

Zen Cart 1.3.8a
Database Patch Level: 1.3.8
v1.3.8 [2008-10-18 22:36:19] (Fresh Installation)
MySQL 5.0.22
PHP Version 5.2.9

What I have are 5 different products. I currently have a flat rate for 2 types of product, but need to introduce 3 more smaller products, which need a smaller shipping cost - these products are not live yet!
I only ship within Australia.
And some products will be the same price for 3 or less as they fit in the same size package.

What is the best way of doing this??

My web site:
http://www.bonniegreenlingerie.com.au/

thanks Jodi