Please be more specific, your english confuses me a little....
OK, i think i kno what your saying, but possibly when you want to add the new image to your signiture, first try making a new layer on the signiture file (ctrl+shift+alt+n) then opening your image file, selecting and copying it (ctrl+a then ctrl+c, and in sig file ctrl+v) .. OR you can open your image file, hit V which brings up the select tool, then drag the image across onto your signiture file.
IF this doesnt work, PM me and i will assist your further...
same goes for anybody.
This post was edited by 4four4 on Jul 9 2008 09:12am