i read all about kensai/mages but when i try to make one i cant get one. it says in manual that u cant multi-class any kits, only default kits like fighter/mage. no kensai/mage how are ppl doing it? Cheats???

The manual says you can't dual class to a kit.

Ahhhh But you can Dual Class FROM a kit!
Make sure your Human Kensai has 15 or better in its prime req's and 17 or better in mages prime req's.
then play as kensai till level 9 , Dual class to mage and when your mage is level 10 you'll get kensai abilities back.
Also IMHO, I'd choose katana as your weapon of choice for kensai then work to getting zerthamon blade(katana type) that allows extra spells to be memorized when you become Official kensai/mage.
Also kensai can't wear armor but that robe of venca can be worn and its pretty nice.
Hope this helps
Eric