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Proxima
yes it will wipe your item_index.tpl
Usually to over-ride a module template you put a file in the skin, so try adding
/skins/YOUR SKIN/jrProfile_item_index.tpl
That might work, or try adjusting it from the template editor
ACP -> MODULES -> PROFILE -> PROFILE -> TEMPLATES -> item_index.tpl
That makes the database override work instead of the file system one. Not sure either will work in this case, need to test.