Originally Posted by Eggcake
It's in /system/media
If you are S-OFF you can just adb push C:\asd\asd\asd.zip /system/media/bootanimation.zip while the phone is running.
Otherwise you need to do it in recovery.
But wm's method is really the easiest way if you want to change your bootanimation before you have flashed an update.
While I'm at it: could you guide me to a thread/site where I can find infos regarding signing zip files? I only found really old threads :S
actually,i did it in this way,first,you need have the program called java, after you download it ,you have to set a java's environment which you can search it by yourself,attention: if you do not know much java languages ,advice you to install it in the default location. second,you need a Auto-sign tool which you can also find it by searching in xda. Then you should unzip the Auto-sign.rar under anywhere you can find it .
After you have done all of these,you can make your own rom !(all of the work below is in the unzipped folder called Auto-sign)
put the rom you have reformed into the folder called "Auto-sign",then ,you need to rename the rom to "update",after that ,double click it the Sign.bat in the folder,wait for awhile,you will get another rom called "update_signed",it is the rom you can flash into your Desire. English is not my mother tongue, if you can not understand what i have said, please reply me with simple and exact words, then, we can communicate with eachother.