Motherboard Specs

I have an hp vectra 5182-5444 motherboard. I cannot find any specs info on it. I even called HP and they won't help unless I pay. I need to know how big of a hard drive this motherboard will support. I already have 2-3gig hard drives but would like to go to a 10 or 20 gig with a 3 gig as a back up drive. Does anyone have any information on this motherboard? I've searched for hours in different search engines and have had no luck finding anything relevant.