1) Open Cydia
2) Download this package
Now, when you open a PDF, it will ask you to either Load or Cancel it. This is what will happen: (http://twitter.com/cdevwill/status/20131127970)
(picture taken from cdevwill's twitter account.
2) Download this package

Now, when you open a PDF, it will ask you to either Load or Cancel it. This is what will happen: (http://twitter.com/cdevwill/status/20131127970)

(picture taken from cdevwill's twitter account.