One quick tip for trading players is to open 2 instances of NOSE. You can copy players in instance 2 and paste into instance 1. When you're done, close instance 2 without saving, then close instance 1 and save it.
Lines can be done in a hex editor , pasting data from a spreadsheet. Check out my NHL93 64-team hack and excel sheet. You'd still have to do each team individually (if changed), but it's easier than doing it in NOSE (https://forum.nhl94.com/index.php?/topic/11734-nhlpa-hockey-93-64-team-rom-snes/)