Ok, then your CPU is running 6 individual clients, one on each core, and each client is processing it's own work unit (WU). There is a way to instruct your CPU to process 1 WU across all 6 cores at once. They are SMP WUs. They are larger than the single-core WUs you are doing now, but they were designed specifically for multi-core CPUs like yours. They will garner you more points than the single-core WUs, if that matters to you.
If you want to switch over and get those instead, you will only need one CPU client. You can use the v7 client or the older v6.34 client.
The v7 should automatically recognize the multi-core and set up for SMP folding.
For the v6.34, you will have to set it up in the configuration. Follow
Clifford's guide, and when you get to the question:
Change advanced options <yes/no> [no]? type yes, then press ENTER
press ENTER for the next few question until you get to
Additional client parameters. Use space to clear. type -smp 6, then press ENTER
Don't forget the part of Clifford's guide that talks about the passkey. You will need it to get the bonuses.
I hope this helps you. If you have any other questions, ask away.