I'm glad the xml inspector is helping. As for your other questions:
- Radar label - I haven't skinned the radar so I don't know if you can move the text. ID="AreaText_Label" looks encouraging though.
- Inv icons - You can remove the bag icons on the inventory windows by either making them invisible (substitute with a blank image) or making them really small (Width="1" Height="1").
- Money background - Look for "money_player_all_background" in the xml file. There are 3 sizes. I'm not sure which tga the vendor window uses.
Hope that helps and good luck!