"save as" to a different directory, then zip that directory to a zip file seems to work better for us than doing a bun file. Any of these techniques have the problem of version mismatches, plug differences, and general setup differences.
It's also really easy to dump wav's of each track with or without the FX burned in. Then you can import those into any version, with any plugs, or even a different DAW (eeek!)
select all the tracks, then do an "export"
in the export dialog on the left set the source as "tracks" and it will pop up a window to let you select the tracks you want to export so you can modify to export all the tracks or only the ones you want.
You can check whether you want FX, automation, etc. etc.
Then you can save all that as a preset (there may be a preconfigured preset that does what you want too).
Put in your file name, and export the files to a directory.
gabo