Maintaining slides across multiple PowerPoint Presentations

[Cindi]

Help!
I need to maintain the same (or similar) slides across multiple
presentations, each with its own design template and custom colors
(similar presentation customized for different clients). I've
researched linking and embedding PPT slides but this won't work for me
because the inserted linked/embedded object doesn't pick up the slide
master colors and formatting of the new presentation, nor is it
editable apart from editing the original (which would change the
colors/formatting of the slide across all presentations). Has anyone
else experienced this challenge...and does anyone have a feasible
solution?

Thanks