I think a statement like
<quote>
You can however redistribute the different toolboxes or the separate
files that can be found on matlab central for both commercial and
non-commercial use, as long as the copyright is not removed from the
source files. Derivative works, in addition to the above, must also
distribute their source code under similar conditions.
</quote>
would be better. Anything less and either the code shouldn't be
uploaded
to sourceforge under their terms of use, or it doesn't protect you
against abuse of your code..