Is anyone familiar with connecting Websphere and a SQL database?

I know that I need to somehow connect via the datasource setting in websphere but all the instructions that I have been able to find are more cryptic than would seem necessary. Is the database name via ODBC connection or do I somehow explain the servername/database name as SQL knows the database?

And all this interacts somehow with the properties for the datasource???

Note: instructions must be for someone who just skims over the top of these things. I'm one of the phone schmucks and have a test environment all loaded up on my PC and would just rather connect to my local SQL than to the shared Oracle data.

thanks,