How to separate out Plan and Profile Sheets into separate files?

I don't think you can, but if it is possible, I'll be watching your thread to see how it's done.

This is one of those options that should be allowed, so that the work can be spread around to more people.

One of the workarounds may be to break your project into a number of separate corridors. The way ORD leverages reference files makes designing that way pretty easy. Each corridor would then have fewer plan/profile sheets each, so that you would have (for example) 5 files of 10 sheets instead of one file of 50. It's not quite the same, but it gets you closer.

I don't think you can, but if it is possible, I'll be watching your thread to see how it's done.

This is one of those options that should be allowed, so that the work can be spread around to more people.

One of the workarounds may be to break your project into a number of separate corridors. The way ORD leverages reference files makes designing that way pretty easy. Each corridor would then have fewer plan/profile sheets each, so that you would have (for example) 5 files of 10 sheets instead of one file of 50. It's not quite the same, but it gets you closer.