Say I have a package file for a glove for the right hand and I want to make it for the left. I know how to flip the textures and all but what do I do to get it recognized as a different package than the original so it won't override it?
Basically that would need you have to re-calculate the instances. The easiest way to do that would be creating a new upload with either TSRW and CTU. It is possible to do this manually but it sure will take about 2 hours of your time to get everything to work properly and link stuff to each other So I would go with the easiest and shortest method in this case