Malaika, when do you need to give your next injection? I am treating a snake right now, and don't do another injection until tomorrow, but would happily take a video for you (the ones I found on youtube look like garbage - unless somebody else can find a good one to post here). If you'd like, I can also PM you my phone # to walk you through it if it would help in any way.
Also.. was specifically are you being asked to do with the silvadene cream? (as in, what does your vet's instructions state on the medicine)