For switching out boot animations, I just use Root Explorer to delete the current bootanimation.zip from /system/media, and then paste the new one in there. No need for terminal commands or flashing.
Example, download the bootanimation-blue.zip from the thread at XDA, rename to bootanimation.zip. Navigate to /system/media using Root Explorer (Or any file manager that will let you navigate there). Mount the system as R/W, delete existing bootanimtion.zip, paste in the new one! Re-mount the system as R/O, reboot to see the changes.