Blender2goOGLEearth 
software:

blender 2.42a
collada blender export plugin (python script) 3.108 - to be placed in /blender/.blender/scripts directory
google earth 4.02091 (beta)
python 2.43 (2.5 version gives path error - could be fixed?)

howto:

- obtain GE footprint: pick location of where model is to be placed - file/save/image or printscreen,
in blender, go to view/backgroundimage/use backgroundimage - and load the image file

considerations:

- scale; since this has no importance upon transfer to GE - make it as big as possible, since it will turn up really small in GE
- delete any cameras, lights, shading information, and RGB textures
- GE will import RGB colour values, multiple materials(with RGB colour values) and UV-mapped textures
- textures should all be single sided, so all normals should be facing outwards; select all objects, go into edit-mode, select all vertices, and press ctrl+N
- paths to image files are relative, so all image files to be used should be placed in the same directory as the model
- do not create a material and click the 'text-faced' button, just UV-map the faces of the objects
- GE only imports mesh information, so modifiers like sub-surfing, lattice deformation, and curve-type objects dont show up - unless you apply the modifier before exporting the object (or 'convert to mesh' with for example text)
- GE will recognize alpha values/ z-transparency

- create model -

export:

- file/export/collada1.4dae > collada dialog box > name file > check 'select triangles', 'disable physics' and 'use relative paths' buttons > do NOT check the 'use UV image' button (this will export ONLY UV-textures and leave out the RGB colour info
- click 'export' button
- optionally, check the created .DAE file with a text editor

load the file in GE:

- go to desired location in GE
- optionally, create an image overlay for the GE-surface
- in sidebar, go into 'temporary places' and create a folder and name it appropriately
- right-click on the folder, choose 'add image overlay', browse for the file and go through the options
- position image overlay correctly
- right-click the folder again and add the model (add/model) - browse for desired model and go through options
- model will show up VERY small, with a yellow bounding box surrounding the model in order to scale, move and rotate it
- optionally, create a custom icon; right-click > add/icon and browse for icon
- add a placemark; right-click the folder > add/placemark and go through options (in the description field, html coding is allowed!)
- make snapshots for the view of the location for all elements in the folder > right-click element > properties > view > snapshot current view
- transfer the folder to MyPlaces; check all elements, right-click on the folder > Save to MyPlaces
- right-click the new folder in MyPlaces > save as > name the file and click save to create the .KMZ file
- optionally, check the file with ZIP or RAR app for it's contents