Wow, it's been that long since my last post???
Anyway, I've been looking for a long time a goo way to do a real looping simulation to use in games but the only way I've found out was a compositing trick. which never looked the way I wanted. I decided to ask the great Peter Quint on his Vimeo channel about how he would do it in houdini. here is his answer:
thanks again Peter!