magiclauncher is a mod installer you can install mods without editing minecraft.jar
you can install any zip mod its a verry good mod installation i use toomanyitems and reis minimap clay soldeirs mod singelplayer commands but u can use the installer you can install any mod that you want but you did not whant to edit minecraft.jar please comment on my blog post to see if you like magiclauncher o and you can play online server still