slanker, here's a link to Caverject's website. It contains instructions on how to inject. You have to be careful to avoid veins and nerves.
http://www.caverjectimpulse.com/content/Inj_Guide.pdf
I am injecting 3 times a week, so 2 months would be about 24 injections.
WARNING TO LURKERS and anyone else thinking of attempting this: I can't say this enough, if anyone gets the idea to inject Caverject or any other vasodilator, self-dosing can send you to the ER! Education yourself throughly before attempting any of these methods. It is strongly advised to use Caverject under the supervision of a physician. An untreated priapism can cause you to loose your penis!