pendrive with cdrom partition

Hi all,
a friend of mine gave me a pendrive (it's a gadget of a car dealer). This
pendrive has two partitions: a fat partition and a cdrom partition that has
an autorun file and plays a video when the pendrive is inserted. Can I
delete the cdrom partition ? I tried with "hard disk low level formatting tool", after formatting the flashdrive it's says that the disk is formatted and I must create a partition, but it did nothing all files into, fat partition, and cdrom partition are present

Can you help me ?

Thanks in advance

Hio

I still tried with hdd low level formatting and with hdd scan (erase option), the fat partition is deleted, but the cdrom partition isn't deleted :-(

Any suggestion/idea ?

thanks a lot

Hio