(adsbygoogle = window.adsbygoogle || []).push({}); I've tried to download bosstool but it is outdated for the 4.2.1 firmware. Any alternatives??

You don't need Boss Tool, when you jail broke the first time nd you opened Cydia it performed the same steps that Boss Tool did. So just do a google search and find how to remove language packs and other stuff to open up space....

Yeah this pretty much sums it up, lol google is your friend