DIP settings & Rewind how to access?

Having been a CoinopsX user for a while and just got Legends Unchained up & running on my ALU, and have a few questions:

1. Is there a way to change game DIP switch settings to change number of lives etc like in COX? I read you need to plug in a USB keyboard and push tab key? Is there a way to access these settings without a keyboard? Also, once changed do they save each time you load the same game or do you have to manually change them every time?

2. Also is there a way to use the rewind button in game like in COX? Is there Setting option for this? If yes, how do I change it?

Thanks in advance !