Your first questions, yes your asus motherboard has a driver disk that has most of the drivers on it. If you have already used the disk, go to their website and click on driver downloads. Asus motherboards are very nice, but alot of them need drivers that are not supported on the cd.
Second question, Go here for more information Asus Motherboard Support
Here you will find about how to fix this problem if not, just add your question to the topic, i will get back to ya as soon as possible
Also on your second question, i just installed a 80gb hd, and i had the same problem on my 8AV motherboard. You need to add the hard drive to the partition list, other wise you might, and i mean might have to create a driver floppy disk. Just click on the above link to learn more.