The 01 February 2014 build is recommended for PPC Macs with MacOSX 10.4 or later. However, the 25 October 2009 build may be more stable on some configurations. Link should be in the (old) setup manual in the Known issues section.
But, indeed, 10.4.11 + Classic would be a better solution.
(In case you cannot find the link, next week I will be back at my Mac and can more easily post the link again here.)Edit:
The issue you describe is know as a sign that you do not have write access to your Home folder. Check the permissions for your Home folder in Finder Info panel for the folder.