Make sure you select "Photoshop Manages Color" in the CS3 print with preview window. Select "Document" also, not "Proof" (The source image will have something like AdobeRGB or sRGB next to it). Also, the "Match Print Colors" only relates to the image as it appears in the little preview window. If by disabling Epson "Printer Color Management" toggle, you mean selecting "Off/ No Color Adjustment", that is correct. In the Epson "Print Settings" toggle, select "Color", "Media Type", "Advanced Settings"
I use "Relative" with BPC checked, but if your profile maker suggests perceptual, try that first. BPC has no effect on the Perceptual intent.