Here you can find here some stuff that I wrote for Blender 2.4. Maybe you will find something interesting here? (Blender 2.5 was rewritten anew, nearly from scratch. It has a very different UI and API. The introduction of version 2.5  had broken the add-on compatibility. Fortunately, since that time there was no such "revolution").
Here you will find some scripts (add-ons), which I used in my modelling. All of them are Blender extensions, written in Python (for the newbies: it is name of the script programming language, not the snake!) Click here, or on the picture, to read more and download these solutions.
Description of a Blender 2.4 plugin, which let you use the vector SVG files as textures. Useful in case of renders from short distance. Click here, or on the picture, to read more about it.
This tutorial shows, how compose a rendering of airplane standing on the ground with a photo of grass airfield. Click here, or on the picture, to read more about this solution.