Modern -> 1.4.7 Backport Support

I ask you as someone who sticks to 1.4.7, who is willing to forgo all the newer versions just so I can edit texture packs easier. However, whenever I use this tool normally, I have to convert to Beta 1.7 then build it up all the way to 1.4.x, copy and pasting individual texture files from the original resource pack version:

please, PLEASE add back porting support for 1.4.7 (for example, the ability to back port 1.8, 1.12 or 1.16 resource packs to 1.4.x.) You don't know how much this would mean to me!