Try using SheepShaver. You ought to start here:
http://www.emaculation.com/doku.php/sheepshaverGoing through this page, you'll want to scroll down to the links where the latest versions are posted. Or, you can just try this link from here (if you're using Windows):
viewtopic.php?t=5325If you want the latest version with the startup sound, keep in mind that you should delete the old executable and re-name the new executable to be the same as what the old one was... hopefully that's not too confusing. Oh, and be sure to drop the "boing.wav" file in the SheepShaver directory as well. From the instructions, placing the appropriate .dll's where they belong in the system folder shouldn't be too hard to figure out, so you should be good there. As an additional hint, you may not need to look as hard for ROM files as you may initially think, either.
You will need to create a virtual drive for your main HD, and this can be done by using the HFFV explorer included in the SheepShaver package. There should be plenty of tutorials lying around here that will teach you how to do this. Apart from making the initial HD to install things to, you'll need to grab Disk Tools 8.5... or you could read the tutorial here:
http://www.emaculation.com/doku.php/sheepshaver_setupFrom here, you see that setting up SheepShaver is much like setting up a new, albeit old, computer. So, you will need to search out the software you need to do tasks. I'm pretty sure you want to use SheepShaver for Odyssey, as I'm certain the soundtrack requires QuickTime to run. You can use SheepShaver for a wide variety of OS's, but if you just need to run Odyssey, use System 7.5.3 and its upgrade, which you can get for free from the Apple website. There should be a link somewhere. As per Odyssey, you can find a copy in the link in the first post.
As a final bit of advice, make sure you use HFFV Explorer to bring files into your virtual HD. Or, you can do what I did, and make a 50MB virtual volume which you can then use to install software onto the principal volume. Use the GUI to load any needed volumes before starting SheepShaver. Also be aware that you need to press the "run" button in the GUI for any changes you commit to be applied to the emulator.
...Hopefully this will help a little when using the start-up tutorials?