I want to delete these cars becuase its bringing my car count up, I want to have one 1 car in my alternate account, can someone please help me, these cars are really annoying!
The only way you can delete them (AFAIK) is by deleting your GT5 game data, do not re-download the cars from the store at this point. Load game up after you have patched, the cars you mentioned will have exclamation marks next to them and now you will be able to delete them from your garage.
Edit - Just to mention it's been a long time since I did this, so do not take my words as scripture and make sure you backup your save.
I also know I could de-activate all content and re-download all DLC but I was hoping there would be a more simple way, a secret way that we would have to go talk somewhere else . . .
P0UP0N I'm glad your head hurts, same with any else who didn't read the question properly, I said I wanted to do this on my alternate account.
I can re-download these cars anytime I want anyway as long as PSN stays alive