True Image home 2011 Licensing(4 PC family)

I have been looking for optimal backup solution for some time and found Acronis products. They seem to perfectly fit my needs but I have one question regarding licensing of true image home 2011.

Do I have to purchase 4 copies of True Image to make hdd images of 4 pc I have at home? If so then maybe you should consider a multi-pc family pack of some kind, becouse i think 240$ for disk images of my household computers is a little to expensive. I know there is Acronis online backup, but not everyone needs online backups. I think there are many people who would pay premium (maybe around 100-130$) for multi-pc (say.. 5) license of standard Acronis True Image.