URGENT Oscommerce invoice amendment

We have the standard oscommerce/cre loaded invoice template. Basically it needs to look like the fancier invoice contribution (image from the cont attached). Tax Invoice # retreived from the order number customer comments during checkout no logo to show needs to show GST wording instead of Tax If you can do the packing slip to match as well that would be great This is urgent and I need it done in the next 24hrs max please. Please let me know if you have any questions.