If you are starting from scratch, then take up a freetrial from www.printjob.com
Once you verify your email address, you will be able to get into a fully working admin system, from which you can build a storefront and any number of custom client accounts.
The PrintJob System has lots of different areas, but you can get started in the System Settings. This is where you define the “Storefront”. The link for this is at the top right of the Admin System, a button which looks like a cog.
If you want to go ahead and create a client account which is completely customised and outside of the general storefront, create the client, then click on the client settings. In here you will be able to ‘detach’ the client from the main default settings, and apply unique rules to it. There’s more about this in the videos section and in the knowledgebase.