If you are feeling lucky and want to test something out for me, you could try using the search and replace in vB Styles and Templates, replacing "Gil" by "$vboptions[rpg_currency]"
hang on... all I have to do is use this search and replace in my xml file
Why didnt I think of this.... d'oh!
First step: Open postbit_legacy and find both instances of "Gil" replacing with $vboptions[rpg_currency]
Okay I made revision1 of the rpg_templates.xml, upload and run the Repair -> Templates in rpg_install.php

You tell me where else that phrase is hardcoded and I'll fix, but I think that there shaved the major bits off