Tons of problems

Hi freak761, it sounds like the bios was corrupted. Contact ECS through their online technical support, click on this link; http://www.ecs.com.tw/ECSWebSite/Support/TSSRequest.aspx?CategoryID=1&MenuID=19&LanID=0
Fill out the required information. Request a new "updated" bios for your board. Most manufactures charge $5.00 US for a new bios. ECS's web site for the P4M900T-M2 V1.0
http://www.ecs.com.tw/ECSWebSite/Downloads/ProductsDetail_Download.aspx?detailid=822&DetailName=Bios&DetailDesc=&CategoryID=1&MenuID=6&LanID=0

With respect to your Hisun pen drive. Many people claim the total size of their pendrive may be fake.
There is a suggested test program that might help. Run, Bart's Stuff Test 5 Version 5.1.4 to help check your pendrive. http://www.google.com/search?hl=en&q=Bart%27s+Stuff+Test+5&btnG=Google+Search&aq=f&oq=

In windows XP you can also use windows disk manager. Open windows run window & type in diskmgmt.msc than click ok. Format the partition of the pendrive through disk manager.

Good luck!
Mike