I tried to launch a slave from Ambient and a message warning that a parameter was missing appeared. I will test more. Noticed that using iGame to launch WHD games has no effect using the hardfile. This problem doesn't occour when I use the folder configuration. So, if you want to run a WHD games automatically from Ambient using iGame you cannot use the hardfile. If you run E-UAE and load WB 3.1 the WHD games work flawless. Going to read old post here and on the web to learn more.