I sell and make cables for musicians. I sell both the parts to make cables as well as assembled cables from the parts I sell. Can I use attributes or some other feature to ensure that I can do both, but that the stock of all the parts diminish once an assmbled cable sells?

OK it is fixed. The problem really was that my hosting provider makes it hard to change the file permissions. I eventually managed it with Filezilla on SFTP mode.

I have just installed CE Phoenix and I get the following Security Checks "Admin HTTP Authentication" "sce_admin_http_authentication" "HTTP Authentication has not been set up for the CE Phoenix Cart Administration Tool - please set this up in your web server configuration to ...