hscroll + img tag on dynamic textfield

[gykz]

hi!
i'm trying to make a ticker viewer and putting a logo between one and the next.
I can insert an image from the library in the textfield
I can scroll the text
BUT I can't make the img scroll too. It gets sticked in a corner of the field and the text moves on

is there any way to solve it or do it different?
i've thought also having a mc masked but i don't know how to get the width in pixels of the textfield

thanks a lot