SSO Solution...Need Urgent Help

I dunno if I'm posting in the correct forum but I need urgent help. I'm currently a student doing my final year project in school. I've been task to come up with a prototype/solution for a Single Sign On(SSO). I've been researching for about 3 weeks now but I can't really comprehend solutions found on the web. I currently have 2 computers to work with, software available readily on hand are Windows Server 2008, SQL Server 2008 developer edition, visual studio 2008. I'm only familiar in VB.NET and SQL Database codes and basic java codes. Can anyone be able to give me a step-by-step solution on how I should do it because my programming is weak too.