we cant make it easier than you has done kerber
i hope it will help
a torrent is a file with a link in it(like a emule or a edonkey link) like ed2k or emule you need a client for download your rar file.
i like azureus client for download.
to launch the download simply open the torent file.
a rar file is a compresed folder like zip cab bz tar etc...
you need a decompressor program to extract it.
there are a lots of extractors like winrar winace 7z winzip...
extract rice beta 10 plugin compresed file in the plugin folder of your emulator
and and the compresed file of bmg lib near the emulator file (in the same folder as the emulator)
you need to put "THE LEGEND OF THE ZELDA" folder you have extrated from the rar downloaded with your bitorent client (the djipi pack) in the hires folder in the plugin folder. then in rice seting menu tick "load hi res textures if avaliable" and i hope it will work
if you got pb try to find a friend who know a litle how to use it (in rl or msn or things like that)