WMI Problems

I'm using WMI to get various information about the system... and it works just fine on my computer. But when I run it on other people's machines sometimes the motherboard will return "To Be Filled In By O.E.M" and if the system has a SATA drive it reports it as SCSI. Is there another way to find this information besides WMI?

WMI will be your best bet. Since all motherboard manufacturers may or may not fill in all the information you really cant do much about that AFAIK.
Also, I believe that SATA uses a type of SCSI controller so that may be why it resurns SCSI instead of SATA.