Hi !

I just installed Lionheart and after that i installed the .exe from the Bonus_Setup.zip into the Lionheart game folder.

Was this correct ?
Any way to check if the "bonus" stuff is correctly installed ?
And what does this bonus stuff actually do ?

There was a bonus CD with some extra content that came with the original game (extra merchant, and an extra quest at the beginning). This is what's on the Bonus_Setup is. If you actually ran the .exe (i.e. you didn't just copy the .exe file itself into the game folder), then it should be installed into the game and you're good to go.

*edit* there's a description of the bonus content here: http://www.gamebanshee.com/forums/general-rpg-discussion-87/bonus-disc-29229.html

WARNING: spoilerific.