在Flex3中的2列中显示复选框

I am using Flex3 and a newbie to it. I am using repeater to create checkboxes. I don't want to align all checkboxes vertically because there are a lot of them. I want to show checkboxes in 2 columns to save some space? I can do some magic to x and y properties. But is there any easy way to do this?I am using Flex3 and a newbie to it. I am using