- On load, the game now detects graphic sheets and sounds whose IDs are "discontinuous", as well as graphics intended to directly replace preset graphic sheets.
- Edit sheets dialog can now handle "discontinuous" graphics. (The edit sounds dialog already could.)
- Edit sheets dialog prompts user to create a new sheet if there are none already, and also if there are some but not ID 0 (in the latter case they can cancel and still edit the sheets).
- Edit sheets dialog prompts user to convert sheets if the scenario is legacy, rather than doing it silently
- Edit sheets dialog now has "new" and "delete" buttons
- Edit sounds dialog now has functioning "delete" button