Multisite CI installations - HOW TO

[eluser]developer10[/eluser]
[quote author="Zeeshan Rasool" date="1272290993"]Why you want to do that? i mean your app folders will be accessed by their domain name. However you can put your application folders out side CI installation any where (not checked on sub domain). I my self use to keep application folders out side CI so that i can add my new application in index.php easily. In your side, you can easily move to different applications if you put some checks in index.php with a single flag type param to make an application default and each time you have to update it to switching b/w applications.[/quote]

why? well, i'd like to host lets say 4 sites inside one hosting account.

Let's say example1.com will be pointing to sub1.mysite.com
example2.com will be pointing to sub2.mysite.com
example3.com will be pointing to sub3.mysite.com
example4.com will be pointing to sub4.mysite.com

(each domain would be set to go to the desired subdomain on the registrar).

I only have 1GB of my hosting package and only 140 mb left, so i dont want to:

- waste my disk space
- update CI individually (i update only one CI installation instead)
- i do want to share some resources (libraries, etc.)
from the main codebase

I think those are good enough reasons for having this arranged in such way, don't you?