Medicals changed in December 2012 and there no need for the appendix C anymore, that's why it's not there.
So - use the OUTLAND pack and do not worry about the inland process, which forms are the same etc. Just don't even download it, it will avoid a lot of problems! download outland, print them all, and start! it's confusing at first, and you'll be overwhelmed, angry, confused, and a few other things... but it will eventually come together. we've been through this, and we survived, so will you! and before you know it, you'll be the one giving advices to people....
use the check list that is in the Part 3/ Western Europe guideline, that's the only one you need. If you start using different checklists from different types of applications, you'll get yourself confused! make a "self check" to things you need to ask for to different people, and that's about it...
For the medicals - here is the list from CIC website: http://www.cic.gc.ca/dmp-md/medical.aspx call around to ask for prices, and ask what they need. Normally between 3 to 4 pictures. book the appointment, and that's it. you don't need to bring anything anymore.... the doctor will give you a form to add to your application as a proof that you have done the medicals but you won't get the results, and you don't need them they go to London and wait for your file there!
Which forms to send? all that are in the application package, except for use of representative, and IMM5562 which is for Paris.
For the Aussie certificate: ask for it. If by the time you are ready to send your application package, it's not with you, then write a letter explaining that you have applied but didn't get it yet. Be polite and apologize, and say that you will send it as soon as you have it.If you have a proof ( online form etc, then add it there, so they can see that you are telling the truth) but make sure that you include a reference so they know that you are aware of it. I did that for my application in London (needed 7 police certificates, could only get 5 in the right timing, so wrote 2 letters and sent the two missing as they came along - was still process in 4 months in London).
For the final fee: pay it later. Either wait for London to ask for it ( they will ask when they are ready to issue the PR), OR ( and I would advise to do that), pay it in 3 months let's say. get the receipt, send it to Mississauga + to London VO as a proofs, together with your aussie certificate for example, and your file number ( never send anything extra without the file number), so when they are ready to issue the visa, they can see that the fees have been paid in full, and it won't delay your file.
it looks a lot, but if you put work and effort into it, and you are organised, it will come together pretty quickly. It's tedious to sit at a desk and just fill it out but there is no way out of it, so just start!
And come back for questions whenever needed!
Good luck,
Sweden