It doesn't matter what program you use to compress the JPEGs, this server is auto-set to recompress anyway, so you're jacked. It's best to upload the file with the absolute least compression possible- and to let only the server do the compressing so it doesn't suffer from being compressed twice. In Photoshop, use maximum, in PDN and GIMP, use highest settings, you won't regret it. The JPEG sucks ignorance is why people *cough* are using PNGs now when JPG is still superior for true color images.
As for the car- not any worse than my GTA car releases. Good job.
As for the car- not any worse than my GTA car releases. Good job.