I'm pretty sure it because that's just the place you upload the kernel file to in order to have hajack intercept it and start the upgrade. There's no actual need to have the upgrade file stored on the empeg.

On a related note, I've recently started using jEmplode to update my hijack kernel. It's oh-so-easy. Like click a menu item and an ok button kind of easy. Highly recomended to any who updates there hijack kernal even semi-frequently.

John