Add-on [you] hack

Hi, is there a way to implement the vb [you] hack on xenforo. Its just dawned on me that I have a couple of theres which are several thousand posts long that i wouldnt want to lose when i switch forums
I wont lose them, but if the [you] hack doesnt work, then the title of my welcome thread will become 'welcome to the forum [you]' instead of 'welcome to the forum stevebullman' ?