A final post to Ask Brad for the night:
It’s me again. Yes, I figured out the straightforward answer. Good for me not knowing what I’m doing and not being familiar with all the MT tags to begin with—such as MTCategoryLabel. *chagrined* I apologize for taking up your time. My Archive File Template now reads and works properly as
<MTIfEmpty var=“CategoryLabel”>unslated.html</MTIfEmpty><MTCategoryLabel dirify=“1”>.html
Now I’ll just be trying to figure out ways to also tackle this whole overly-long-MT-rebuild-time issue that everyone’s been up in arms about long before I ever knew what Movable Type was…
*phew!!!* and goodnight.