[ewiki] restricted upload avoiding attachments/-modus?

Hello!

I am seeking the following feature: I am using a system w/ authetication 
(_perm_unix) where I want to allow not-logged-in-people to upload pictures. 
(Logged in persons shell still be able to upload any stuff.) 

My setup offers to layouts, one for visitors w/o any wiki-features, the other 
(at another URL) w/ the edit-/upload-/etc.-mechanisms.

My approach: Having html enabled I included the following on a page called 
"upload" (or whatever):

<html>
<div class="upload">
  <form action="?id=attachments/Upload" method="POST" 
enctype="multipart/form-data">
    <b>Datei</b><br>
    <input type="file" name="upload" 
accept="image/jpeg,image/png,image/gif,application/x-shockwave-flash" 
size="40">
    <br><br>
    <b>save w/ different name</b><br>
    <input type="text" name="new_filename" size="40">
    <br><br>
    <b>Kommentar</b><br>
    <textarea name="comment" cols="40" rows="3"></textarea>
    <br><br>
    <b>upload to:</b><br>
    <select name="section"><option value="">main</option><option 
value="section2">section2</option><option value="Upload" 
selected>Upload</option></select>
    <br><br>
    <input type="submit" value="FileUpload">
    <br><br>
  </form>
</div>
</html>

... which is a modified version of the usual upload-mechanism in edit/-modus 
(restricting uploading only to images).

My problem is, that though it works, I end up in attachments/-mode, now 
allowing the user to use the ordinary upload-mechanism (what I don't want). 
I'd like the user rather to be forwarded to [ImageGallery] or s.th. simliar.

Any ideas?

* one option would be to check in my index.php for the title of the page 
called and in case it is attachments/Upload I'll forward to ImageGallery - 
but that's rather dirty
* alternativly, would copying and adjusting plugin/module/downloads.php be an 
option?

Happy for replys, solong, Tim

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