For future reference, MetaMorphs will work across any 2.X based ROM and I cant say it will work on Gingerbread cuz I have not seen how the file naming is but Im pretty sure it will work on that as well. That is the beauty of MetaMorph.
If themers just did a MetaMorph instead of a flash update, they would never have to make multiple ones. Just one that would across all versions of a ROM.