How's it going.Let me read of your question. Give me a minute.
What OS are you ruining?
Can you explain by soften?
You mean blur?
Did you get this sorted out? If not.. I assume you're looking for feathering or a similar method in CS6. Feathering is probably the easiest way to soften the edges if you're worried about how it will look when moved to your flyer.
1) You will need to start by creating a selection around the image that is left over.
2) Then choose Select -> Feather ... (Or it's Select -> Modify -> Feather)
3) Pick the pixel count you want to feather and that should soften your edges. .. The larger the number, the more blurred the edges. I would expect you want something more subtle, so try something like 0.5 or 1.
Is that generally the effect you're looking for? (I mean, had it worked).
And what happens when you attempt that? Will help me in figuring out what may have gone wrong and where and what other options there are.
Your other option is the refine edge tool, which gives you pretty granular options overall.
Control+alt+r on windows to get it to pop up. Same thing, make sure you're on the layer you need to edit, and make sure you select the object first. Choose Smart Radius, makes life easier as it determines more about the edge for you.
From there you have multiple edging options.