Pass ASP session data to a plugin

I am trying to get a string of custom tags from a user's session [ASP] data and get it into a plugin so it can parse the string and build a drop down box.

I have used DnnTokens plugin to create the custom drop-down but just need a way of 'injecting' the session string.

ASP CKEditor instance looks like this:

<%
sBasePath = "/_fckeditor/"

Set oFCKeditor = New FCKeditor
oFCKeditor.BasePath	= sBasePath
oFCKeditor.Value = FCKContent
oFCKeditor.Height = 500
oFCKeditor.ToolbarSet = "Editor"
oFCKeditor.Create FieldName
%>