index.php, system_folder variable and multisite installation on windows

[eluser]developer10[/eluser]
OK folks, i'm still confused regarding whether or not there is a simple solution leading to multi-site functionality in CI

What i want to achieve is this:

- have several subdomains containing what normally "application" folder of CI contains
- my host lets me choose a directory for my subdomains, so i choose them to be like this:
public_html/subdomain
- i want the CI system folder to be in my root directory, of course
- i will have my domains redirected to http://sub1.mysite.com, the other one to http://sub2.mysite.com, etc.

For now, i left

Code:

$system_folder = "system";

unchanged, but for application, i did this:

Code:

$host = $_SERVER['HTTP_HOST'];

switch($host)
{
    case 'localhost':
        $app = 'tumac';
        break;
    case 'kupi.povoljno.ba':
        $app = 'kupi';
        break;
    default:
        $app = 'glavni';
        break;
}

    $application_folder = $app;

On localhost, i'm able to get "tumac" and "kupi" apps, but on my server (where those directories/apps serve as subdomain directories) i only get index.html from "kupi" directory shown.

I know i have to do something with the code at the bottom (that deals with defining certains things, among other, APPPATH) but do not know what.

Furthermore, i feel i might have 2 solutions without tweaking the above mentioned code.
1. set the directories for my subdomains as "application/sub1" and "application/sub2" instead of "sub1" and "sub2" in the root directory
CON for this: what if i move to some other server that wont let me keep this structure?

2. instead of making subdirectories, make simple directories for each subdomain, like this: "public_html/app1/" and "public_html/app2/" but in my CP app1 and app2 are not defined as subdomains.
CON for this: I would have to redirect my domains in this way: "http://mysite.com/app1" and "http://mysite.com/app2" - but i'm not sure if that is possible, at least for stealth redirection..

So, tweaking the code for APPPATH would be the best solution so please give your hints.
Thanks!