there's a way. depends on if your rooted or not. if you're stock like me. basicly my advice is using GO Lanucher.
with that in mind the launcher's name is ice cream sandwich theme by kovdev, and then there's the ics go widget theme. there's this other one that's called ICS Pro all in one go theme.
my advice use this theme on top that first app by kovdev i was talking about for the full on ics look, and just buy a live wallpaper from ics for like 99 cents. and bam. XD