my_lv = new LoadVars();
my_lv.owner = this;
Will throw an error on the owner part as LoadVar's does not have an owner property inherient in its class. Therefore, your technically supposed to write a wrapper class so you can pass a scope parameter in.
Thats dumb as hell and should of been implemented internally. Therefore, you can do:
my_lv["owner"] = this;
And it accomplishes the same thing, except, the compiler doesn't get mad.