Thanks for the quick reply Jim. Unfortunately we don't have many Pro licenses, and I'd rather not create a repository for something that I think should be an allowable ad hoc operation. We have different teams using different SVN repos, and on occasion its nice to share useful developer enhancement packages (like Quickdrop plugins), without having to put them into a shared VIPM repo and having all clients point to the shared repo (with a license they don't have).
Instead they should be able to just send out an email with a hyperlink, or put the hyperlink in a wiki page, and have a single click pull it up on VIPM.
Sounds like this is not currently possible, shame... Not too big of a problem, just requires downloading the package locally first, then double clicking locally. I was hoping there was a simple way to skip that step.