Use PK2Editor, and insert file from attachment to media.pk2 in:
\server_dep\silkroad\textdata\
anyway u will get Autoselect with select range 70 - u must stay near on mob to get him selected.
So u must change autoselect range in sro_client.exe - but idk how to do it.
Say on what server are u playing. Maybe there is Range patcher for autoselect for ur server.