I haven't yet made it for 1.7.5, however it can be used on 1.7.2, download the recommended build for forge from here:
http://files.minecraftforge.netThen run the installer and then goto your launcher select the profile, launch the game, then close the game.
Next download the 1.7.2 version of the Dalek Mod and put it in your mods folder at %appdata%/.minecraft/mods.
Next open the launcher and launch Minecraft again and it should be installed.
Do not get the latest forge build 1057, it will not work, get 1024