The fact that you say you need help to debunk these photographs proves only that your interested in finding any unremarkable explanation which will fit even if you have to take a hammer and push the square peg into the round hole. Narrow mindedness does not impress me. However, I am very interested in the photographs so I'll toss you my 2 cents worth.
The quality of the photograph is just too high to say it was some kind of far-off light, airplane, helicopter, or decaying artificial sattilite. These images, while still rather blurry, have a lot more clarity than most UFO photos I've seen. This means to me it's either a very real object, or it was completely faked.
Natural Objects
The most naturalistic object which fits it's reported shape is some kind of wether, scientific research, or military balloon. The problem is that weather balloons and the like are typically flown at high altitudes, where their insturments tend to be most effective. The object shown here is either a very huge object high up, or it's a smaller object at a lower altitude. I wouldn't think it to be a particularly high object because if it was as big as that would make it to be, then air traffic in that area would be disrupted. So, we are left with an object flying low, so I think.
Hoax?
The possibility of a hoax is of course, very real with any UFO case. In fact, based on the description of the objects movements, the quality of the photographs, exct... their is no way to say that the witness mistook something normal for extrordinary. So, to me the hoax idea is a stronger idea than mistaking a balloon. Their are a few reasons to suspect a hoax besides the quality of the photographs. First is that the witness states that he was alone. Second, he describes it as having it's own method of propultion from the way it moved. And of course, it flies off at high speed just like at the end of hundreds of other "extrordinary" sightings. These photographs could well be fake, or it could be some kind of advertisment balloon in the parking lot which he is adding a big story to. Of course as well, the man's name has been witheld.
Real?
Wether or not you think it's real depends on if you trust the website you got the photographs from. Even I, a person who thinks that their are a number of downright bizzar UFO sightings, am not going to believe every set of prints someone hands me and every story someone gives me. The first thing that makes me wonder about rense.com is the fact that they have a whole article on how "DANGEROUS" milk is. Then, they have a very anti-semetic feeling article about how we are going to take out Iraq and what it means to Israel (written by 2 time Presidential looser Pat Buchanan). Some of the things they write about on the other hand are bonafied.
My Conclusion
Considering who is publishing these photographs, the fact that no one can corroborate them, I think they are most likely a hoax.