What about the links at the end of the top post, for the 546, it gives firmware bin-files. Click:
are you saved now??
Put the url in "translate a web page" here:
http://world.altavista.com/ and choose "portuguese to english".
--If you download s1fwx from the download section, extract it in a folder,
--put the downloaded firmware (needs unzipping too) in the same folder (copy in another folder too for savings)
--rename copied firmwarefile to "dump" (without " "), and run "list".
Compare the info there with the info on/about your player for similarity.
Hope this helps, looks like it is for a player the same as yours, but another brand?