Had previous problems installing Communit Builder, due to folder Create and file Copy problems.
Permissions I know, but could not solve, even with 777 throughout the site.
Now resorted to copying to folders and using Discover.
This appears to work.
Just got to get the last 2 modules, mod_comprofilerModerator and mod_comprofilerOnline
However, these are giving errors when reading the XML files, during the Discover step.
Not continuing with the INSTALL, until this is resolved.

Failed loading XML file
/var/www/vhosts/ModelPipeline.com/httpdocs/modules/mod_comprofilerModerator/mod_comprofilerModerator.xml
XML: failed to load external entity "/var/www/vhosts/ModelPipeline.com/httpdocs/modules/mod_comprofilerModerator/mod_comprofilerModerator.xml"

Have you read the FAQs? Have you read all the installation docs and followed them step-by-step? Have you tried the expert installation, also documented in the installation docs?

Yes, I've read all the installation documentation. I cannot locate an "expert installation" documentation. Where is that?
However, I do not think I am doing anything complex.
I think the error relates to using Joomla v1.6.1 and the XML file for mod_comprofilermoderator, which has comments in it about not being readable by Joomla v1.6
I'm just not sure if I should proceed with the install, if the Discover is reporting these errors about the XML file.