[Lynne]

Could have done it with some css:

.postbitlegacy .userinfo {
text-align: center;
}
.postbitlegacy .userinfo .userinfo_extra {
float:none;
text-align: center;
}
.postbitlegacy dl.userinfo_extra dt {
float: none;
text-align: center;
}
.postbitlegacy dl.userinfo_extra dd, .postbitlegacy dl.userinfo_extra dd a {
text-align: center;
}