[racket] A list of vectors

Hi all,
here more than three hours that i'm locked on a function, i defer to you =)
My problem : i have a list of vectors, each vectors represents a text syntax
(not html syntax, just text), and were created with the result of a format
sqlite SELECT operation.

For example, my list of vectors L is like this :
(define L '(#("nickname || ' ( ' || date || ' )' || content")
            #("zobi ( Thursday, October 14th, 2010 12:40:51pm ) <p>try</p>")

            #("zf ( Thursday, October 14th, 2010 12:43:56pm ) (a ((href
\"foo.html\")) \"sometext\")")
            #("zf2 ( Thursday, October 14th, 2010 12:44:59pm ) (a ((href
\"bar.html\")) \"anotherone\")")))

So, (first L) is a vector, (second L) too, etc.
Now, i want to replace each string, for example "Thursday", by
"<<Thursday>>", in my list of vectors.

I have created a function, wich i call like this :
(rush! L  '() "Thursday")

this is the function :
(define (rush! T super-list a-string)
  (if (empty? T)
      super-list ;; here is the problem
      (rush! (rest T)
                 (append
                  super-list
                  (list (regexp-replace* a-string (vector-ref (first T) 0)
(string-append "<<" a-string ">>"))))
                 a-string)))

Now, if i compare L and (rush! L '() "Thursday"), i have for L:
'(#("nickname || ' ( ' || date || ' )' || content")
  #("zobi ( Thursday, October 14th, 2010 12:40:51pm ) <p>try</p>")
  #("zf ( Thursday, October 14th, 2010 12:43:56pm ) (a ((href \"foo.html\"))
\"sometext\")")
  #("zf2 ( Thursday, October 14th, 2010 12:44:59pm ) (a ((href
\"bar.html\")) \"anotherone\")"))

and for the function :
'("zobi ( <<Thursday>>, October 14th, 2010 12:40:51pm ) <p>try</p>"
  "zf ( <<Thursday>>, October 14th, 2010 12:43:56pm ) (a ((href
\"foo.html\")) \"sometext\")"
  "zf2 ( <<Thursday>>, October 14th, 2010 12:44:59pm ) (a ((href
\"bar.html\")) \"anotherone\")")

BUT it's not a list of vectors, it's a simple list ...
Instead of
(if (empty? T)  super-list ...
i've tried (if (empty? T) (list->vector super-list) ... mamamia, it's no a
list of vectors, but just a simple vector ...

I really don't know how i can replace a-string into a list of vectors so,
because my rush! function doesn't works like i want ...

Thank you for your help,
-mw
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