hey, i will help you with your wallpaper problem, it`s already been coverd a milion times in this forum go to this thread i wrote it there how to do it
http://www.everythingicafe.com/forum...ing-29129.html
for the other 2 you can try to delete the files manualy from your phone maybe it will work and you cant do any harm, but it`s the same thing as uninstalling them from installer so i don`t know what to say, i never used itoday and i have a full version of video recorder so i can`t give you more solutions to your first 2 problems