How to display Excl. Tax on single products and change text to GST?

[neonnebula]

Hi there,

I am new to Magento. I have searched and searched and tried all sorts of different things to fix this to no avail!

Any help is appreciated!

My problem is very simple: 

On grouped product pages under the prices the text "Excl. Tax" is displayed - which is good.

I just need to make "Excl. Tax" also appear on single product pages under the prices in exactly the same way as above.

AND I need to change the actual text "Excl. Tax" to "Excl. GST"

here is an example of the grouped product page:

http://dexters.co.nz/dexters-platform-trolley.html

here is an example of a single product page: 

http://dexters.co.nz/mobile-high-lift-scissor-table-350kg.html

Please Help!