The internal CD/DVD drive on my six-year-old son's PC (WinXP, 500MB RAM) needs to be replaced. I was thinking that it might be easiest to just buy an external drive rather than opening the box. But then I wondered about performance. He will be running kids games and learning software and many of them require that a disk be inserted in the drive to run the software. Will the performance of the external, USB-based drive be enough for this type of application? Or should I go through the added work (and risk) of trying to replace the internal drive? Thanks in advance for your help with this.