I am a beginner in magento. I needed to add notice to admin for some special product. But I have added my modifications to core files.
I added my code to,
app / design / adminhtml / default / default / template / sales / order / view / items / renderer / default.phtml
Cause I was able to access some product attributes there and it was the best place I found.
Now I just would like to use a copy of this in,
app / design / adminhtml / default / my_newtheme /templates/..../default.phtml
and use it in my xml,
app / design / adminhtml / default / my_newtheme /layout/..../sales.phtml
But it does not work....
It is a small change for me , not some huge one that i need special block and some observer or so...or do I?