craftgrrl | n00b screen-printing question...

Hey there,

Sorry if this question is dumb, but I've tried searching for answers with Google and I'm just not getting the info I want. So, the question is this:

I've photocopied my image onto a transparency. However, one part of the image didn't quite fit on the page and I have another transparency copy that I want to cut and use to make the image whole. Can I do this? Will overlapping the transparency (just a little, at the edge of the image) affect how the emulsion works? Will using scotch tape on the transparency affect it? I only have one screen and one image and even though I know I can wash it out, I want to do it right the first time! Many thanks, crafters!