How to manually install JReviews when normal installation fails
From JReviews Documentation
If after your failed installation you can see JReviews in the components menu in the Joomla administration, follow these steps:
1. Create the two JReviews component folders, if not already present, in:
- /administrator/components/com_jreviews
- /components/com_jreviews
2. From the JReviews component zip package, extract all files, except jreviews.s2 to the /administrator/components/com_jreviews/ folder
3. Rename jreviews.s2 to jreviews.zip and extract the files/folders to /components/com_jreviews/
4. To finalize the installation, login to the administration and enter the following url:
- http://yourdomain.com/administrator/index.php?option=com_jreviews&url=install&sql=1