Go to this link with your incredible's web browser or Opera Mini. I used Opera Mini.
http://sites.google.com/site/droidlife24/home/google_earth.apk?attredirects=0
Make sure that you have the "Unknown Sources" (under Applications) box checked.
If you type the link in manually the keyboard doesn't show an = character so I didn't enter that character, nor the 0 since I needed the =
Opera opened up the page and instanly ask to save it to my SD Card (no option to save directly to phone). Once it has downloaded Opera asks to open it or not. Open it and it will install. Works great on my Incredible.
This is all with Opera Mini mind you.
How this helps.