Cannot format a USB 2 gb Flash Drive

I received a 2 gb FLASH Drive from a supplier. It has their presentation and media information on it, but also has about 1.6 gb of free space. I want to now use this "Thumb Drive" to store other information; and I tried to reformat it for Mac (or Windows). BUT when I go to Disk Utility, I see 3 things:
1. First after my main HD, I see this: "1.9 GB Flash Disk Media" with the orange and white USB symbol (icon).
2. Indented below #1 is a white ard Drive symbol (icon) and I can reformat this for DOS or MAC to about 1.6 gb of space. I've done this and call it SCSWal2.
3. BUT there is a second orange and white USB icon at the same left-side position as the first, and this is labeled "30.9 mb Flash Disk Media". In DISK UTILITY, if I right-click and ask for Information, it says this is a Media Type "CDROM" and LOCKED.
When I click on this "30.9 mb Flash Disk Media" in Disk Utility, everything is "grayed-out", i.e. I cannot erase this, cannot do anything to it.
If I eject the 1.9 GB Flash Disk Media (basically if I eject the SCSWal2), then the 1.9 GB Flash Disk Media disappears in Disk Utility. BUT THE #3 "30.9 mb Flash Disk Media" remains in Disk Utility (it does NOT appear on the Desktop). BUT if I just pull-out the stick drive, then this disappears.
HOW TO FULLY FORMAT THIS STICK DRIVE so that the "30.9 mb Flash Disk Media" disappears?
Regards,
Steve 18 Sept 2008

Yes, it indeed seems to be some type of "U3" (that's new to me) or other separate hard drive. In fact, when I insert the new stick drive into my MAC, it shows the disk image (about 1.6 gb) but does NOT show the 30.5 mb (like a Windows computer does) - it says that this drive is not in a format that is recognize by macintosh OSX and either for me to click IGNORE or EJECT. No matter which I check, I cannot "see" this second 'drive' - only if I click IGNORE then I can see it in DISK UTILITY, but can't do anything about it.
As to the web reference you gave, it seems that will only work if I am on a WINDOWS PC - the UNINSTALL software (about 3.3 mb download) is an 'exe' file, i.e. not a Mac program-- is there any Mac software to eliminate the U3?
Just about the time I thought things were getting compatible, this comes out and now all the MacUsers who want to view the pps presentations on this partition cannot!
Thanks for any additional assistance,
Steve

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