UPDATES to post #11:

(1) Anyone who downloaded the Activate-host-mode.txt and Restore-client-mode.txt files before I posted the .tar.gz file: please delete them and take the .tar.gz instead. The untarred files have a strong risk of corruption during the download. They may look OK, but then when you paste the text into X-Term your 770 will crash and reboot instead of entering host mode.

(2) Maemo Talk puts a "?" symbol in the URL of any attachment in a post, and for some reason the Tear browser and the pre-2008 Opera refuse to download from URL's containing that symbol. You can download directly to your 770 if you use MicroB. If you are running OS2006, you will have to download initially to some other computer and then transfer the file to your 770. Sorry, I hoped to make the 770 completely self-sufficient for this procedure, whatever OS was used.

(3) The large chunks of code in the original post have been replaced by text attachments, now tarred as mentioned in (1) above. (Even if the chunks of code had been left in, you still could not have copied them in OS2006. The browser does not let you highlight text on the page, and it did not even display all the code.)

(4) It was not entirely accurate to say that the procedure does not work in OS2005. The problem with OS2005 is that you have to use a flasher to become root. If you are in a position to do that, there is an easier and better way for you to enable host mode.

(5) A few comments were added in italics on 2010-07-15.