Hi Sleepy,
you write that you copied the program to flash disc - you mean the content of the .iso right? (unetbootin is to be run from the menu in pclinux and create a bootable install usb)
I've spent a complete day and night trying to get unetbooin to work with 2010 beta 2 - I've got around installing with another usb-util, but found out that a 2G usb stick must be formatted to fat-16. Actually I noticed there was a difference when formatting to fat-16 in Microsoft Vista and in PCLinux - only the Vista format was recognized by my bios - now I'm googling what on earth the difference is