Developing Area

I would like to get the following Examples to running:

I develope different apps for customer, so during the development i have created a lifetest area:
I have registered a new subdomain lets call it dev.mydomain.de.
here i would like to place one production folder, and for each app a separate appfolder.
now i have the root folder of my subdomain:
there i would like to beginn with folder
_scripcase
in the folder _scriptcase i have the produktion folders:
conf
file
file/docs
file/img
prod
xfolders…
and at least the folder
tmp

Now i want to make onefolder for each applikation, lets call them: app1, app2, app3
app1
…all the scripcase folders for publishing
app2
…all the scripcase folders for publishing
app3
…all the scripcase folders for publishing
and know my question how do i have to call the folder _scripcase from each app?
i try ./_scripcase/prod
and …/_scriptcase/prod
but it does not work: my loginpage says: no production environment

The scriptcase case folder needs to be in sub-domain folder /html or public_html dependant on file structure

Add the production zip file unzip it in here then open production UI by going to browser and typing url/scriptcase/_lib this will open UI setup database connection here. when done return to browser and typing your url/scriptcase/app1 etc this should open the app