This will only work in pvz2pak that uses og pvz.
first you wanna put all the textures in reanim. Then you have to put 
Zombie_Credits_Screendoor.reanim in the other reanim that is in the 
compiled folder. And lastly in HxD you need to the search button then press
"go to" and you want to enter 29DA84 and put 133 in Ulnt8 that is on the right
side of HxD. Now you save it.