Resolving a problem with Palm synchronization using iSync 2.1

Making iSync 2.1 work with PalmOs devices.
This tip applies only to the devices supported by iSync 2.1.

Yesterday I have tried to enable iSync with Palm Treo600. As usual, I have followed all of the procedures, read all of the official apple support articles, yet it would not work.
When I was trying to enable Palm devise from within iSync I would get a message reporting that I have not installed Palm HotSync nor have I used it. Reinstallation of Palm software did not help. So I decided to reinstall the iSync. Which in its turn messed up the whole OS and forced me to the MacOs Tiger Archive and Install and then to Erase and Install.
After all of this it still would not work. However it showed me that I am not of a peril and it is likely OS fault.
Anyway. Here what you should do.
Before enabling Palm Device Syncing in iSync you should, of course, install the latest version of the Palm desktop. Then you need to change permissions for the folder and its content at /Library/Application Support/Palm HotSync. You should ctrl+click the folder and choose Get Info. There make yourself an owner of a folder and allow yourself to read and write. Also opt in to apply the setting to the enclosed files and folders.
After this follow the iSync procedure as recommended by Apple, to enable the Palm Os syncing.