I have a sony vaio vgn-ux1xn and i bought an external disc drive and it didn’t work when i plugged it into the USB on the laptop, but it did when i plugged it into the USB on the docking station. I know the disc drive is only compatible with USB 2.0 and I thought the one on the laptop was, but it must not be, so is there a way to change it to be 2.0?
it only has one usb port

My brother is selling an old computer to our neighbor. What would be a fair price for this machine?
Compaq presario 2500
2.8 Ghz processor, 100Mhz FSB
3 years old
1400 x 1050 matte display
floppy disk drive
pcmcia
usb 2.0
Intel Celeron Processor
768mb of RAM
Ati radeon mobility graphics card
No internal wireless
2 hrs battery life
fans can be noisy
7.3 US pounds in weight
He says that, "The power button still works but sticks frequenty, so it’s best to turn it on with the "one-touch" hotkey buttons, and the CD rom drive sticks shut sometimes."
I forgot to mention it’s a laptop

Ok so a friend has one of those small netbook things and needs to install a fresh copy of windows xp but the laptop doesn’t have a disk drive, now i have an xp disk, is it possible to say make an iso of this disk (which i have already done) and then somehow convert it or make it so if i put it on a usb flash drive i can then boot and install xp from the usb flash drive rather than have my friend have to go and buy an external disk drive just to install xp with? If this is possible can someone please tell me how its done!
Thanks