Hi Amber,
Like most other manufactures, Phoenix offered a very poor owners manual some years ago, very generic in nature and it covered every model for a number of years. Many deviations were not covered in the manual. I think I have a paper copy of that manual. Our PC is a 2007 model year and I think that copy dates a number of years earlier. Trust me, you will NOT find it useful. Your best resource is asking questions on this forum.
Email me direct at dittmer.ron@gmail.com and I will email you the 2004 sales brochure in PDF format, which should help answer some of your questions with regards to the features and capacities of your particular PC.
Ron Dittmer