i am totally new to asp sessions.
this is what i am trying to do.

i have videos.asp, a page of dynamic links that will pass an id via
url paramter to asx.asp which i have used response.write to
create a dynamic asx file which will recieve a filepath similar to
this from videos.asp which gets its entries from an admin upload page.

it actually writes the entire asx file and opens the recordset from
the database but the important part for the purpose of this question
is..

<Ref href="(dependent on
session)://mydomain.com/videos/<%=(rsMovies.Fields.Item("MoviePath").Value)%>"
/>

where i have (dependent on session) is where it should say typically
in an asx file say - "mms"
...however i need to set up something using a session so that before
entering videos.asp the user has to pass thru a setsession.asp
page...this is where a session must be created and the user should see
a radio button group where they can:
select one of 2 radio buttons whcih will says CABLE or FIREWALL, which
will pass information via a
session from videos.asp and then to asx.asp changing the (dependent on
session) area to to either "mms" or "mmst" which are the 2 protocolvs
used in streaming windows media server depending on whether or not u
are behind a firewall.

whoever answers this need not know anything about asx files or
streaming windows media but just how to do something like this via asp
session object.  so i know how to do this but i need the actual asp
code.

this will be a snap for a sessions expert.

I may just not understand what your needing to know... but you can
create and set session variables on the fly, like so:

Session("variablename") = "whatever you want"

You could also set a Session variable equal to the contents of a radio
button on a form from another page like this:

Session("variablename") = Request("rdoButtonName")

Maybe this will help?

well so basically 3 pages. 
one page sets a session based on radio buttons and or checkbox.
the next page has a dynamic link to a third page which generates a
dynamic asx file. one of the lines in this file is

<Ref href="(session variable)://mydomain.com/videos/<%=(rsMovies.Fields.Item("MoviePath").Value)%>"
/> 

i want to replace (session variable) with code that sets it to  mms or
mmst based on radio buttonyeah selected on the first page.

what would i actually need to put into the path to get it to input the
session and how do i get teh check box to create this session on
submit?

appreciate the help..i just need a little more if possible.

well i figured this out on my own so dont worry about it.