To use this pack to the full extent of it's ability and to get my custom biomes (cherry blossom trees), custom water colour and custom lava you're going to have to use a patcher. It's a pain, yes, but until Notch supports texture packs fully by letting us use custom biomes, water and lava, it's the only way to access them. I suggest using the Beta patcher I've provided in the link below. It installs once and lets you swap between any texture pack with the normal texture pack selector (in the main menu of Minecraft). It automatically patches the pack you switch to so you don't need to worry about re-patching every time you want to swap texture packs.