"i`ve just tried Riptide, but unfortunately it doesn`t work in this case."

Sorry to hear it didn't work out for ya - Keith is presently tuning up his plugin and he's taking input from this thread here:

http://forums.cgsociety.org/showthread.php?f=47&t=624337

You may want to pop in and mention the problems you had or if you have some suggestions etc.

-Will