This is a tutorial on how to make a custom bootscreen for HTC ROMS ONLY. This will NOT work on AOSP roms. First, get the images you want to make your bootscreen out of, minimum requirement is two. Next, get the bootsound you want. Now, name the image you want to appear first "boot1.gif". Name the second image you want to appear "boot2.gif". Repeat this process for as many images you have. Now, rename the sound boot.mp3. Push them all to /system/media/bootscreen and reboot. There you go, your own custom bootscreen.