Joomla 1.5 templates – 1.6,1.7 templates Installation Problem
We find that most people usually like to stick to the stable platform of joomla version they are using as upgrading to a new version usually pose serious problems or you would like to use your 1.5 version template on the new upgraded version of 1.6 or 1.7, for the brave ones here is a little tip. Mostly please pay attention to the difference in headers in your templateDetails.xml.
Firstly you may wish to visit these links to learn how to adapt your 1.5 version template to 1.6,1.7 versions. Visit Joomla Documentation and then here also. These would help you with ideas on what to do , there are not much documentations available for 1.6, 1.7 templates as at the time of this writing and the 1.5 versions of joomla would not be supported anymore in some months time.
One of the major problems is not being able to find the 1.5 converted template when it has been installed on a 1.7 Joomla version. It appears automatically on 1.5 version but not the same in 1.7 version. if you experience these problems please visit your admin and then follow Extensions manager > click on Discover > then Discover on top close to purge cache. If you have done everything right, your template should appear .