Newly installed ZC improperly?

[malevolence]

So this is my first time trying to build a website being, in my opinion, im pretty smart and can usually figure things out pretty well. With that being said I purchased a domain and hosted it on domain.com. I installed zen cart through their hosting services ecommerce tab everything seems to fine other than the fact when I try searching through the support forum here i basically have NONE of the referenced folder/file pathways.

I have so far successfully installed a new template and added over 60 products. What im wondering is if i need to download ZC to my PC and upload everything to my server so that im not missing anything? And in doing so will i loose all the work i have already done to the site?

My biggest issue is that i cannot seem to change the very very top banner where it says WEBSHOP.. ive tried copying and editing header.php on my computer in notepad, and replacing it on the server. I changed the text from 'logo.gif' to my own image thinking it would load that img instead with not result.. ive attached a pic to show what exactly im refering to.