Need help on combining Kirupa News Ticker and the Combobox Component

I want to make a news ticker based on the Kirupa News Ticker Tutorial http://www.kirupa.com/developer/mx2004/newsticker.htm .
My concept is that in the main stage I will put a combobox component with news categories like 1. Sports 2. Financial News 3. Politics …etc.
If you choose “Sports” it should load a sports.xml file that has the main sports headline news.
If you choose “Financial” it should load a financial.xml file that has the main Financial headline news.
I used this code

ActionScript Code:

[FONT=Courier New][LEFT][COLOR=#000000]function[/COLOR] loadXMLCOLOR=#000000[/COLOR] [COLOR=#000000]{[/COLOR] [/LEFT]

[LEFT]if COLOR=#000000[/COLOR] [COLOR=#000000]{[/COLOR] [/LEFT]

[LEFT]xmlNode = [COLOR=#0000ff]this[/COLOR].[COLOR=#0000ff]firstChild[/COLOR]; [/LEFT]

[LEFT]caption = [COLOR=#000000][[/COLOR][COLOR=#000000]][/COLOR]; [/LEFT]

[LEFT]url = [COLOR=#000000][[/COLOR][COLOR=#000000]][/COLOR]; [/LEFT]

[LEFT]total = [COLOR=#0000ff]xmlNode[/COLOR].[COLOR=#0000ff]childNodes[/COLOR].[COLOR=#0000ff]length[/COLOR]; [/LEFT]

[LEFT]for [COLOR=#000000]([/COLOR]i=[COLOR=#000080]0[/COLOR]; i=[COLOR=#000080]0[/COLOR][COLOR=#000000])[/COLOR] [COLOR=#000000]{[/COLOR] [/LEFT]

[LEFT]newsMC.[COLOR=#000080]newsText[/COLOR].[COLOR=#0000ff]_alpha[/COLOR] -= [COLOR=#000080]5[/COLOR]; [/LEFT]

[LEFT][COLOR=#000000]}[/COLOR] [COLOR=#0000ff]else[/COLOR] [COLOR=#000000]{[/COLOR] [/LEFT]

[LEFT]displayCOLOR=#000000[/COLOR]; [/LEFT]

[LEFT]p++; [/LEFT]

[LEFT]delete [COLOR=#0000ff]this[/COLOR].[COLOR=#0000ff]onEnterFrame[/COLOR]; [/LEFT]

[LEFT][COLOR=#000000]}[/COLOR] [/LEFT]

[LEFT][COLOR=#000000]}[/COLOR]; [/LEFT]

[LEFT][COLOR=#000000]}[/COLOR] [/LEFT]

[COLOR=#808080]// Add Item to List.[/COLOR]
[COLOR=#808080]
[/COLOR]

[LEFT]my_cb.[COLOR=#000080]addItem[/COLOR][COLOR=#000000]([/COLOR][COLOR=#000000]{[/COLOR][COLOR=#0000ff]data[/COLOR]:[COLOR=#000080]1[/COLOR], label:[COLOR=#ff0000]“Sports”[/COLOR][COLOR=#000000]}[/COLOR][COLOR=#000000])[/COLOR];

[LEFT]my_cb.[COLOR=#000080]addItem[/COLOR][COLOR=#000000]([/COLOR][COLOR=#000000]{[/COLOR][COLOR=#0000ff]data[/COLOR]:[COLOR=#000080]2[/COLOR], label:[COLOR=#ff0000]“Financial”[/COLOR][COLOR=#000000]}[/COLOR][COLOR=#000000])[/COLOR];[/LEFT]

[LEFT][COLOR=#808080]// Create Listener Object.[/COLOR][/LEFT]
[/LEFT]
[COLOR=#808080]
[/COLOR]

[LEFT]var cbListener:[COLOR=#0000ff]Object[/COLOR] = [COLOR=#000000]new[/COLOR] [COLOR=#0000ff]Object[/COLOR]COLOR=#000000[/COLOR];

[LEFT][COLOR=#808080]// Assign function to Listener Object.[/COLOR][/LEFT]
[/LEFT]
[COLOR=#808080]
[/COLOR]

[LEFT]cbListener.[COLOR=#000080]change[/COLOR] = [COLOR=#000000]function[/COLOR]COLOR=#000000[/COLOR]

[LEFT][COLOR=#000000]}[/COLOR][/LEFT]

[LEFT][COLOR=#0000ff]trace[/COLOR][COLOR=#000000]([/COLOR][COLOR=#ff0000]"Value changed to: "[/COLOR]+event_obj.[COLOR=#0000ff]target[/COLOR].[COLOR=#000080]selectedItem[/COLOR].[COLOR=#000080]label[/COLOR][COLOR=#000000])[/COLOR];[/LEFT]

[LEFT][COLOR=#000000]}[/COLOR];[/LEFT]

[LEFT][COLOR=#808080]// Add Listener.[/COLOR][/LEFT]
[COLOR=#808080]
[/COLOR]

my_cb.[COLOR=#000080]addEventListener[/COLOR][COLOR=#000000]([/COLOR][COLOR=#ff0000]“change”[/COLOR], cbListener[COLOR=#000000])[/COLOR];

[/FONT]

in my “actions frame” and I dont know how to continue…
Any help will be appreciated!:h:
[/LEFT]