Most mods come with their own instructions, but it generally involves adding files to "minecraft.jar". If you want to know how to download it, go to the website where the download link is located, and click the "download" button.
Download the Single Player Commands mod, and use the /fly command.
you go to a website
depends on the mod your downloading
Where can i download the mod
Nope. You HAVE to download a minecraft mod to have it.
Just search in google 'Minecraft mod downloader'
Download it of the INTERNET and then put it on minecraft
You can download it of the official minecraft forums.
you have to downlaod a mod seach for a mod loader and the mod its self
Pokemobs is a mod which you can download.
There is not that I know of!
Download it
download it, I assume.
The minecraft forums
Go to youtube and type how do you download the minecraft comes alive mod and there will be a video on it and just follow the instructions.