> So this lead me to using the advanced variable
> extraction option. However I am experiencing problem
> using this feature. This is since there is no
> parameter (or one could argue the argument is the
> parameter).

You're on the right path but no, I don't believe you can do it because there
is no parameter just the value.

Perhaps the only way would be to write a custom wrapper to handle certain URLs
as you see fit.  (I've never done it myself.)