You can create a slide show that will be viewable on Mac or PC just export as Quicktime movie and save it to the disk. When you burn them to disk they will be viewable however the user has them sorted on that individual computer if by name or date, etc/.
Not just an album.... I said Slideshow then they will stay in that order...
When you have created your slide show you will see "Export" at the bottom of that slide show window. I can connect by remote and show you.
Your question was about saving the order when viewing on a Mac or PC and that is how you can do it. Teaching you how to use iPhoto to create slideshows is a little much for this forum. Here is a good tutorial:
I can remote connect and help you if you wish.