Warmtoe has made a plea asking for people to test out their controllers with a program he has put together, which will hopefully help him get the currently non-working light guns to work with NesterDc & BLOOP:

“ Could you all try running this program with any controllers (anything you have) plugged into the ports on your dreamcast and write down what it shows you on-screen for each controller, and what each one was (as much detail as you can manage), and whether each one actually works with NesterDC or BLOOP – I really want to get some of these problems squashed…

http://homebrew.dcemulation.org/warmtoe/lgtest.zip

Put the info in an e-mail (address in the README) and send it to me, or post it here, if it’s easier – I’ll pull it all together and try and work out what is failing.

If as many people run it as possible, then I should be able to at least understand what the problem is!“