program on a USB use on any PC

i would like to have this on a USB stick so i can use it at work rest and play as i have 3 PSs i use
and it would also be nice to also use this USB as a lock so with out this no one can run this PC when i am not there

Just a idea would it be to much toe also have this program shipped on a usb disk like we would have had it send on a CR ROM i think it would work and no one would be able to copy and send it to friends
like we did in the past
your program is also out on some forums already to down load with a crack but not me i like to support developers
cheers
nigelxxx