My CD/DVD L (and so on) isn't working right. I put the disc in, it makes a loud grinding noise. So I figured that it would be cheaper if I just bought an External CD-RW/DVD+/- DL +/- with lightscribe for a good drive. I don't have it yet. Since the internal drive isn't working does this mean I'm up the s++t, when it comes to installing Windows XP or Windows 7? If there is a way...How do you do it.