Heavy modelling problems

Hi all,

I need help in the following issue. I, alone, must model a new server software for the company I work. The old system was C, now, it will be C++. My modelling experience is not much. The server, however, requires everything a multi-threaded application needs: critical region protection, synchronization, fault tolerance, be able to handle countless requests simultaneously, and so on... To start, I am studying common design patterns, in the site:

http://www.dofactory.com/Patterns/Patterns.aspx

I am also considering using ACE:

http://www.cs.wustl.edu/~schmidt/ACE.html

I will be using some simple UML diagrams (class, sequence, use case), this is not a problem, just to explain the level of modelling I am doing.

What I need is some articles, tutorials, references in this subject to improve my skills. Please, not books. I know they have the best knowledge, but my time is a little short. Thanks for all your help. Any details I will be happy to explain.

Edit: I forgot to tell that my problems range from generic communication (client and server can change any kind of data) to pool of resources and resource management. Thanks