can you explain how does it work?

QUOTE
A little tutorial
codepage conversion now allows user to select the codepage currently used to dislay and the
codepage to convert.
this let user fix those files tagged by foo_freedb2, which treats any tags retreived from the
server as utf-8, but in fact the tags could be something else.
to fix these files, user selects iso-8859-1 as the displayed codepage and the correct codepage
as what user thinks it should be (this can be known if user browses the freedb website with the DISCID).
the displayed codepage and correct codepage are not your operating system's codepage, but the
codepage used to store in the actual file when it is not unicode (utf16) and utf8.
but for other files not tagged by foo_freedb2, the displayed codepage is most likely your windows
current code page.
in fact for any misstagged files, user just needs to known the codepage in the files and
the correct codepage to get them fixed, unless the files really have incorrect tags.
how do I select iso-8859-1??