BitVector

You should be able to click on the "Texture Packs" button on the main screen inside Minecraft and then click on "Open Texture Pack Folder". Depending on your operating system, it should open a folder where you can place a texture pack. Also, there is no need to apply a HD texture patch, since Optifine is already installed with Technic.

I have the same problem as unkown998, if I run TechnicLauncher.exe, it says "Checking Launcher Version" for a second, and then it disappears. If I run the jar from \Application Data\.techniclauncher\technic-launcher.jar, then it shows the launcher. Running WinXP SP3.