Instead of upgrade CXF/CAMEL in an old version FUSE ESB, I suggest you use upcoming FUSE ESB 7.1 which ship CAMEL 2.10.x and CXF 2.6.x out-of-the-box.
Btw, in FUSE ESB 7.1 there's an extras folder which ship CXF and CAMEL kit also.
Thanks for your response. Do you have any idea when (A week's time, a month, a quarter?) this new release will go out?
The intend is to release it in December 2012.