Flash Attribute Tags

Hello all!
I have been trying to figure out how you could add in custom attribute tags that flash can recover.

EX:
<param name = “movie” value = “somefile.swf”>
<embed src = “somefile.swf” width = “550” height = “400”>

Except, that I would like to add a Custom tag, like “randNum” so that the tag user could input some number, or rather, a flash movie could generate a tag with a number already put in…

Basically, heres a really basic version of the idea.
There is a Flash Movie.
In the movie, you can input text into a textfield.
Upon finishing your message, you click a button “save”.
The flash movie then:

  1. Comes up with a random number unique to the message.
  2. Assigns that number to a variable… “randNum”.
  3. Saves message as a xml file to the server as “filename” + randNum.
  4. Outputs into a textfield a generated HTML tag that a user can post on myspace and such so that it will load in the flash movie.

Except… in the tag, there will be a custom attribute. If the random number variable “randNum” was 00112233, the custom attribute will be 00112233.

EX:
<embed src = “somefile.swf” width = “550” height = “400” randNum = “00112233”>

So when the movie opens, it retrieves that randNum from the tag and can use it inside flash. How can this be done? Sorry this post was so long, but I wanted everyone to understand the concept.