Hide those TrueCrypt files (system, hidden)

I have TrueCrypt on a usb "thumb" drive, including a couple of batch files to mount and unmount the TrueCrypt partition, as per this page:

How to secure your USB thumbdrive
http://juand.ca/?page_id=3

I'd like to hide the TrueCrypt folder and executables, so that I can only see the batch files and other non-crytped files. I'm trying to make those files "hidden, system" files, but am having difficulty. Using "attrib" within the CMD prompt is not letting me assign *both* hidden and *system* attributes.

Any ideas or softwares I might try?