Shimergo set up

I need a new pair of nine speed shifters to replace my exsisting tiagra ones and was wondering whether a pair of nine speed camapgnolo xenon shifters will work as I have read on t'internet that you can a pair of 10 speed campagnolo shifters will shift a 9 speed shimano cassette but have read some conflicting things on variuos forums as I know I have to change the cable routing but other that will a pair of nine speed campagnolo shifts shift over a nine speed shimano cassette?
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More info http://www.ctc.org.uk/desktopdefault.aspx?tabid=3946
I use 9 speed campag levers on a 9 speed shimano cassette, no problems. Just align rear changer bang on with middle sprocket