if you want to hack your sieghart, it's easy.....
first...
1)get Sieghart
2)you must have Weapon Change Key ( get from mission or Cash)
3)then set change weapon to job 2 weapon and equip soluna....
4)in the game wait until rage gauge bar full,then press X
5)and change your weapon as fast as possible(press CTRL, Maybe different on other GC)
6)do it 5 times and you become INVICIBLE!!!
tips:every you doing that (change weapon while rage) your damage will increased....
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Sry for my bad english