I currently have an issue with not being able to save properties for specific drivers.
eg. If I right click on Galaga '88 I can see that it uses the "namcos1.cpp" driver and if I select properties for namcos1.cpp it opens the namcos1.cpp properties window but when I set my preferred options and click ok to save them it saves the ini as galaga88.ini and not namcos1.cpp. Shouldn't it save them as namcos1.ini? The funny thing is if I change the name of the ini from galaga88 to namcos1 and run galaga88 it will use the settings from namcos1.ini so I know it uses these "parent" files if they are available but mame doesnt seem to be able to save them properly.