I'm reasonably new to Magento and i'm trying to edit my Magento code/script (what ever you call it) and all the forums keep telling me to
"Copy /app/code/core/Mage/Adminhtml/Block/Sales/Order/Grid.php to /app/code/local/Mage/Adminhtml/Block/Sales/Order/Grid.php." to be able to access it
My question is where the hell is this and where do I enter it?
Probably a very silly question but I'm having a blonde day.