Message skins for galaxy ace(gingerbread)

Are you have upgrade your ace to gingerbread?
If yes then you know that in message you not select any skins(theme) which you previously can do in froyo.
Here is your solution
First download message app here is linkDownload
Now open root explorer and go in system/app/
Now locate mms.apk in that
now rename it to mms.apk.bak
now go back and now go in sdcard and go where you put mms.apk i give here and copy it to system/app/

now change permission of it to rw-r-r shown in image.
Now reboot your ace.
You get message app that you geted in froyo with themes.