Need Help with Unit Card Saving

I acessed a unit card, the Gaul Skirmisher. I've made a new British skirmisher, and wanted to edit the Gaul card for Britannia. So I did, went to the British units folder and saved it as:

#BARB_PELTAST_BRITON.tga

This was becuase the units dictionary line in export_descr_unit was:

barb_peltast_briton

So I called the save after that. Below the bit where I changed the save name (using Photoshop btw), I had another save option. The defualt one there was something like:

Targa (.TGA, .VDA, .ICB, .VST)

So I accepted this option. Below it there were some more options. I checked the boxes for use alpha channels and use lower case extensions. Then I clicked save.

Another box came up, and I selected 32 pixels or whatever it was, and I checked the box saying compress. I then clicked save, started up RTW, and the card wasn't applied to the unit. Anyone know what I've done wrong?

At first sight it seems to me that your are doing correctly.
I can only think in two possible problems:

1- Name and path of the folder: be sure that it is
Data\ui\units\BRITONS

2- The extension of the file. Be sure that the file is not #BARB_PELTAST_BRITON.tga.tga