It is 3.1 GB in size and comes as two BSA's and two ESPs. You get this by viewing available downloadable content for the game, and then choosing the new DLC (like you are buying a new game)
Since it is an ESP, you can remove the Texture Pack by un-checking the ESP's in the Launcher, under Data Files. Some have reported issues with the game not loading after the texture pack is downloaded. For them, it seems to be one of the BSA's got corrupted during download. You can test this by un-checking one or both of the ESP's and seeing if the game launches. If corruption is the case, you will have to re-download the DLC.
If you are running other mods, you may have to work with your Load Order to get what you want. If you have texture packs as loose files, those should load instead of the textures in this new pack. However, if a current mod of your is not working post DLC, then check the Skyrim Mods section for a thread on your mod and the new DLC. Search first as the question may have already been asked.
Previous Thread
http://www.gamesas.com/topic/1343385-skyrim-high-resolution-texture-pack-free-dlc/page__st__180
Screen Shot Thread
http://www.gamesas.com/topic/1343378-hr-texture-pack-out-can-we-get-some-screenshots-stuck-at-work/
Oh, we got something else today, the Creation Kit. You will find that in Steam, under View - Tools. You may have to restart Steam to see it in the list.




