The Polysphere script I made a while back has been in Blender since 2.6, so you don't need to do that any more :) Add Mesh> Extra Objects> Basic Objects> PolySphere. If you don't want to dig for it, you can just download the script and add it in the normal way.…
when you script for pyhton, you can add your buttons to existing menus, like the mesh section of the self, create a new shelf, or even make a whole section in the tab of your choice in the sidebar on the right.
There is this new gsoc where a guy made an icon system for blender, i don't know yet how you put the scripts there in the icons but if you find out drop it here :) http://www.youtube.com/watch?feature=player_embedded&v=gTxd_gZI4QY
That's the reason Blender went the route of using AddOns (not sure you can add stuff like to the main GUI though, i.e. having an option/tool/function appear as a menu item). The custom properties and buttons are also reasonably adaptive but I don't know how easy/well they can be linked through to .py scripts.
I don't think it works with psd's, actually you need and addon just to display multiple layers.Once you do have that you can paint / project on spec, diffuse etc and it saves the layers which i guess you have to import them manually in your psd.…
Yea, I agree that it's easy to access the most often used tools with shortcuts, but the interface doesn't become cluttered because of the default set of tools. It's when you install addons that it becomes a problem as the majority of unofficial addons dont have shortcuts assigned to them, so the only way in which you can…