If you want to change the above so the order number starts from 2000 for example, follow instructions below.

1) Access admin
2) Click Tools
3) Click Store Manager
4) Go to Set next order number
5) Type order number, click reset and then confirm towards the bottom corner
Always take a backup of database and site beforehand

1) Access your website control panel or via FTP
2) Locate admin\images
3) Replace logo.gif with your logo, so basically overwrite the current logo with your logo.gif file
4) That’s it, both Invoice and packing slips will be updated
Always take a backup of database and site beforehand