First link is the setup to convert from apk to bar (including how to get keys to sign)
The second link is the setup of the program to load the files on the playbook
thats all you need... If this is too complicated then you will have to find the apk files, post them here http://bit.ly/apk2bar-form and wait until somebody converts them. when they are converted they will show up here: http://bit.ly/apk2bar. If you do it this way you have to wait because it takes time for it to show in the list when you post it....you then have to wait until someone converts it and loads it back on the page.