You can use WinHTTrack to make a copy of the API on a hard-drive.

You have read the FAQ page I made? [Info] C/C++ Ruby extensions & SketchUp plugins

Thanks for all the suggestions, pointers and tips. I am making progress exporting both raw entities and entities within components instances (including the transformation) It's not complete yet (some instance are place wrongly) but I should be able to figure the rest out (might be group handling etc) Thank you once again.