i know yousaid urfavecolourwas yellow, but ifyourcarpet is blue, walls purple, keep with the theme and stickwith 'winter'colours, yellow,summerry colours could through your room off balance.
with the posters, it depends how big youwant them.
ifyou want giant, maybe make yourown using http://homokaasu.org/rasterbator/
as to the movie posters, keep trytofind companies that buy them diirectly from WB and such, and dont just buy the image, because
1. they're worth more (ascend in value)
2. you know that the posterpapers strong, & wont fade
a while ago, when shrek 2 came outon dvd, i went to a local video hire shop n got 4 giant lifesize character cutouts of pussinboots, shrek, princess, & donkey for free, cos otherwise they just go in the trash. try asking around and seeif they have any ones they wanna get rid of. try video hires, cinemas etc. ucouldprobably find a dukesofhazzard or the aristocrats poster if u looked hard enough!