hmm... no, I confused myself, and I actually cannot make this work.

Here is a simple test program that works on undroidwish but NOT on the new Androidwish I just installed from you:

    set src [image create photo -file in.png]
    set new [image create photo]
    $new copy $src -scale 0.5
    $new write "new.png" 
    exit

On the new Androidwish you sent me, I am getting the error that "-scale" is an unknown parameter, but it is listed in the accepted parameters. I've taken a photo of that error:

http://magnatune.com/p/scaleto.jpg

Also note that changing from -scale to -scaleto causes Androwish to crash:
    $new copy $src -scaleto 100 100