[support] Parsing QUERY_STRING

[Scott]

I have posted at http://drupal.org/node/361193 a request for information
but have yet to hear anything back.  So, I thought I'd try here.  I am
rewriting a web site from php4 to drupal 6.  One important section of
the old site uses QUERY_STRING to pass a parameter thusly:
"../viewform/wcab10"
The string "viewform" represents an actual page but "wcab10" is an index
value.  I'm trying to figure out how to do this with drupal.  So far it
looks as if I need to create nodes for all possible index field values.
Rather I wish to land on viewform (node/xxx) and use "wcab10" as a
parameter for a module (select * from table where index_field =
"wcab10").