Silent_Hill_TP_256x_1.4.6.zip is a release file of the Minecraft resource pack [Official] Silent Hill Resource Pack 128x 1.6.4, made for Minecraft 1.4.7. It was published on December 21, 2012 and is 70.1 MB in size. For the full description, screenshots and every other version, visit the [Official] Silent Hill Resource Pack 128x 1.6.4 resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.