k3b with extra codecs

hi, i'm having some problems with k3b-kde. originally it didn't even start because libdvdread3 package turned out to be just empty virtual one. i found working version from older ubuntu, and got the program to start and burn things. but today, I needed to make audio-cd out of mp3s, and k3b spat out an error. what I understood is, I need the libk3b3-extracodecs-kde3 package. this is in repositories, but it can't be installed because it requires libavcodec51, and on Jaunty there is only libavcodec52. so, how to fix this, has anyone got it to work? thanks. .b