It's a more extreme solution, but using Semantic MediaWiki and Semantic
Forms will give you exactly what you're looking for. Semantic Forms has a
GUI by which you create the basic templates, assign metadata properties, and
build user input forms for data. There's even a java popup to enable the
image upload, the ability to prescribe page names based on template
parameter inputs, and pre-loading for any additional text you want standard
on each image page....all with forms you design yourself.
-CW
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