hmm ok. then try it with this method:
#backup your media.pk2
#open the media.pk2 with an hex-editor and use the replace-function with the strings as "unicode"
item\china\man_item\thief_02.bsr -> item\china\man_item\thief_03.bsr

#replace all and save
i hope this will work, sorry but i cannot text it in isro because i don't have the actual client and in sremu it works with the other method.
edit:
the 3rd(04)
ch female thief-suit and hunter-flag are buggy and made the game crash, so better don't try them.
euro-suitsitem\europe\man_item\trader_eu_01.bsr
item\europe\man_item\hunter_eu_01.bsr
item\europe\man_item\thief_eu_01.bsr
item\europe\woman_item\trader_eu_01.bsr
item\europe\woman_item\hunter_eu_01.bsr
item\europe\woman_item\thief_eu_01.bsr
they start with 01 an you can replays them with 02 and 03
please tell me if this works.