Actionscript need dynamic gradient fill

I found this nice code for creating a gradient fill, but I want to be able to pull in an external text file or xml file so the two colors in the color variable are dynamic. Flash 8, AS2 please.

colors = [0x333366, 0x606BD2];

=======================

wSize = 740;
hSize = 206;
fillType = "linear";
colors = [0x333366, 0x606BD2];
alphas = [100, 100];
ratios = [0, 255];
matrix = {matrixType:"box", x:0, y:0, w:wSize, h:hSize, r:90/180*Math.PI};
_root.lineStyle(1,0xFFFFFF,0);
_root.beginGradientFill(fillType,colors,alphas,ratios,matrix);
_root.lineTo(wSize,0);
_root.lineTo(wSize,hSize);
_root.lineTo(0,hSize);
_root.lineTo(0,0);
_root.endFill();

Any ideas? Thanks!