G'day siberia-man,

Thanks for your response.

I don't envisage needing to do a lot of swapping between versions; in fact, it may not be necessary at all. However, if my use case changes, changing a symlink would be less work than changing the PATH environment variable.

It would require some initial setup. Unlike you, with three portable SP versions, I currently have: a portable SP version, a non-portable SP version, and an ActivePerl version. I'd probably need to set up some *.bat files for this, but that would be a one-off task.

Thanks for your suggestion. I'll keep it in mind.