Thanks to very helpful responses on this forum, I now have MAMEwah starting as a shell. It starts up quite a bit quicker this way, and I'm very pleased with it.
Especially while I'm still configuring everything, I need to get to Windows sometimes. I've mapped a key to exit to windows, but when I start Explorer.exe it just starts an explorer window (for folder navigation), but with no desktop or taskbar. Interestingly, if I start windows normally (with Explorer.exe shell), I can kill Explorer, then start it in the same way, and this restores desktop & taskbar properly.
Anyone know if I'm missing something (I'm running XP Pro SP2)?
Cheers in advance,
Richard