A multi session cd is one of those cd's with a data track and a cd audio track and the game won't work properly or fully without both tracks. You can tell by inserting any cd into any current computer. If you see two cd icons - one data, one audio cd, you've got a multi-session disc.
Because disk images typically are designed for single partitions it isn't easy to back up such a disk. It can be done - with a few tricks in toast - but it involves converting the pcm audio to aiff files and is a pain to configure. I've found a way to make a disk image of both partitions using a windows program - which can be written properly into a multi-session cd with toast.
Interestingly toast can write the cd from the image - but can't make a dual partition image from the cd - go figure.
Alright - first if you haven't already you'll need to start your windows emulator. Download a windows program called UltraISO (www.ezbsystems.com/ultraiso/). Because windows can't read mac cd's - it can only do a "raw" read of the disc. This will allow us to make a disk image. Note that the disk image won't be mountable - but can only be used to make a multi-session cd. .bin/.cue images (there are two files, both necessary) are multi-session compatible - so that's the type of extensions you'll see on your disc image. NOTE: ISO is not multi session compatible - don't choose this option!
1. Insert the cd in the emulator's cd/dvd drive
2. open parallels (or other win emulator), download UltraISO from website above
3. After installing, choose Make CD/DVD image from Tools menu
4. Choose CD drive, other options.
4a. I'd recommend leaving skip bad sectors off - unless you know the cd is good. Sometimes you can get bad sectors on a good cd (bad sectors placed on a disc as a copy protection scheme). If this is the case, you have to turn the option on.
5. Choose BIN (.bin/.cue) as the disc image type as this type is compatible with multi-session cd's. Please note: click on this option no matter if it asks you to switch in a pop up dialog or not - even if the item is already selected - otherwise you might get an iso file which will only contain the data partition.
6. Let it do it's thing. When it's done, you'll see two files - a .bin and a .cue file. copy both of these files to your mac. Zip them in an archive, and upload them here.
To burn, open toast (I've tried this on Toast 8 and 10), choose copy option, choose .bin/cue, and drag the bin file to the window. Choose the CD option, insert a blank disc, and wait until it's done it's thing - you should now have a multi-session cd!
If someone other than myself could test this, I'd appreciate it. Also - should this be in the guides section?