Is there some way to programmatically change the processing
instructions of a .xml form?

Perhaps there's some way to invoke pifix (the SDK's processing update
tool) or the sharepoint relink process?

I've got a form in various sharepoint form libraries that occasionally
moves to a different library. If it can work, I suspect changing the
processing instructions would be a better solution than tripling or
quadrupling each of the number of views that already exist.

Tertiary Q: What is a reasonable "rule of thumb"-type limit on the
number of views and/or size of the manifest file?

Thanks!