Masthax
cd /etc/e-smith/templates-custom/etc/httpd/conf/httpd.conf/
ls
Find the custom template. I don't use phpsysinfo so i can't tell you how it's named but it should be something like 97sysinfo or something.
Thenmcedit [custom template file]
and edit the file.
This doesn't explain 404 error (it should be "restricted" not "not found") but it will enable you to remove the auth and check if you're typing the proper alias.
The not found error comes from another problem. Try to access it trough your ip (with https).