Flex 4.1 Runtime CSS: CSS in module or just CSS

Question

Hi,
I guess this question's answer is obvious but just in case I would like to ask.
I have application which loads a module. I would like to load some fonts before I load the module, so when the module is loaded it displays it's text correctly. So to do that at the moment I load one plain module with a stylesheet in it where I have the embedded fonts, and then I load the module with the text.
Should I not use a module with a stylesheet but compile a stylesheet separately and load it with StyleManager.loadStyleDeclarations() ?
NOTE: Also using the StyleManager I can set true to the second parameter of loadStyleDeclarations which will force updating the styles. How can I do that without loading new stylesheet? I want to do that in case the styles apply for something that is already on screen and I load the module with the styles at a later time.
Another thing is that If I recall correctly if I want to have the stylesheet in swf I need to compile it myself. And with the module with a stylesheet case that happens automatically.
So.. thoughts ?

Answer 1

Ok I read it (maybe for 5th time) to recall things a bit. So let me summarize after reading testing etc what I still don't understand:
1) In my application I have 1 custom skin extending Skin.
import custom.CSCSkin;
public var testSkinnn:CSCSkin;
and on creation complete I have:
var testSkin:Class = loaderInfo.applicationDomain.getDefinition("custom.CSCSkin") as Class;
trace(testSkin);
This returns [class CSCSkin].
But the same thing doesn't work in the module because the loaderInfo is null.
So how do you access the applicationDomain of a module ?
2) Looks like I can use almost any component as you say in the siblings and there is no problem, except for the managers classes and Alert. I guess that's because they are singletons with static vars and functions and they register their reference only once - for one application domain and get restrained by it.
I just tried to use Alert only in a module. Application is empty, just a moduleLoader.
import mx.managers.PopUpManager;
private var popUpManager:PopUpManager;
import mx.controls.Alert;
private var alert:Alert;
On creation complete I have:
Alert.show("TESTING","bla");
In the docs it says that registering the singletons/managers in module will make it throw error when you try to use it in a sibling module. But the fact is that the Alert doesn't work at all even in the module I registered them first - it throws error with the PopUpManager. To make the Alert work I had to move the Alert and PopUpManager declarations to the main application. Then they started working everywhere.
Why the Alert is not working if used only in one module?