how to download a mod:
step 1: download winRAR archiver.
step 2: find and download modloader.
step 3: double klick the modloader you downloaded. now it should be a little list of files there.
step 4: klick on the start button in lower left corner.
step 5: type inn "appdata", then click on "roaming", then on ".minecraft, then on "bin".
step 6: now right klick on minecraft then open it with winRAR archiver.
step 7: then drag the files from modloader to minecraft.jar. now you should have a new folder called "mods".
step 8: find a mod you would like to download that requies modloader. ( not rusigami's modloader)
step 9: do the same as modloader, but this time do not enter the bin, but the new mods folder.
step 10: drag the downloaded mod into the mods folder.
step 11: close it all. and now the most important part, PLAY AND HAVE FUN!!!!!!!!!!!!!

if this helped ya guy's plz comment ;D