I already have Apache & PHP running on my system! Do I let Giga Vault Storage install them anyway? Does it interfere with the Apache and PHP I already have?

Giga Vault Storage installs its own installation of Apache and PHP during the installation. Since Giga Vault Storage is well tested with the bundled version of Apache and PHP, it is best not to use other existing installations of Apache and PHP. In general Giga Vault Storage installation of Apache and PHP will not interfere with the existing Apache and PHP. But if your existing apache uses port 6060 or port 6061, then you need to configure Giga Vault Storage to use a different port during the installation as Giga Vault Storage's apache webserver uses port 6060 and 6061 (for HTTPS) by default.