Hey, all i did was scan the back of an A5 old 1960's comic onto my computer, i scanned it in at a wopping 360000 Pixils a square inch, This is the highest that my printer can print at and the bmp file took up 75mb's. Then beacuse the resolution was so much i could blow it up to A3 size without the quaility deterateing at all. At A3 the size of the image was around 260mb so make sure you have lots of space on your pc before you do something like this ^_^. Then i prited it off on A3 high quality photo gloss paper. The last thing i did was to stick it to my old cupboard
not very crafty i know.. but i am male lolhttp://www.v0rt3x.me.uk/poster.jpg
This aint a very good photo but the finnished thing looks real clear.