Hi Vila,
You can take the script out of a mat and put it in a prim that you apply the default transparent texture to.
Take back into inventory then re-rez and it will take the correct size, though not sure if this is necessary. Happy tinkering
NB : Btw everybody do NOT attempt this with no copy objects. If the object as well as the script is no mod then u can lose it all - i.e. : not able to put script into your own object or put it back in original.