create custom component to reduce banner size

[guiltfilter]

I have been given a banner that feeds xml data into 2 comboBox components. To reduce banner size i have been asked to replace components with my own custom made movie clip versions, can anyone point me in the direction (url or tutorial?) of building and coding my own?

part of the code i will need to update is

function setup() {
my_comboBox1.dataProvider = make2;
my_comboBox2.addEventListener("change", Delegate.create(this, loadScreen));
}

Any help appreciated.

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