That has pretty much been my method for the 90-91 roster I am making. Each day I go in and input any changes I need to make, watch some CPUvCPU action. and save that file. On a seperate file same roster, I do my editing and testing, then go back and apply those changes to the main file, and so on and so forth.
I got the Rockets up to date last night after I do another team I will test.