I have been tasked with upgrading the template of a Joomla 1.5 website to responsive using Bootstrap (a really tricky thing for me since I have only worked from Joomla 2.5 up to 3.4), so I created a base template on a Joomla 1.5.26 Stable local installation.
Client didn't wanted to share code, so I will have to give only the template file, that is the base template modified, but today they told me Joomla version they are using is 1.5.15 and they won't update it anymore since it was the last version that allowed myisam on mysql config. Template is not finished but they want to test it, so I can't find enough documentation since its very old to confirm template will work properly.
Also I am recoding old extensions to try to use Google Maps API, but I can't find almost any extensions left and I'm trying some but can't know if they can run on previous builds. I didn't even was programming or designing anything by the time these versions were released :( could someone enlighten me?
EDIT: So far version 1.5.15 requires myisam database config to run, so it needs a mySQL version lower than 5.5. With XAMPP 1.7.2 it seems to run fine, just delete all cookies from browser to be able to use phpmyadmin and other things. Clientside seems to work fine for now, but maybe Google Maps API will require a bit of patience.
Bootstrap running on these antique its a real challenge but it will be done, one way or another. Thinking of publishing a template just in case anyone wants to revive these old systems.