I'm trying to open a print still image at size of around 6600x6600 and it's like 22mb and photoshop CS4 is telling me it can't open it because "not enough ram". Running unibody 17'', 8GB Ram. WTF? The file is only 22mb. I've been opening far bigger psd files (some were around 500mb). Opening the 22mb tiff file in preview was absolutely no problem. And when i resized the image to 50% of it's scale for test-purposes i could open it in photoshop. Any idea why PS is acting this way?