To read instructions go here:
Click on the 'Download Folding@home' banner to get the client.
I think it's for GPU and SMP folders only but I could be wrong on that.
It will be great for new folders especially as there is nothing you have to do except install it and it will set up and Graphics cards you have.
For folders with GPU already you will have to stop the folding you are doing right now and delete the directory. Otherwise you will have two wu's trying to fold on the same graphics card.
Please beware that it's a BETA release, but released to the general folder, so there may be some bugs still to be worked out. If you encounter any let me know and I'll put you in touch with Stanford about your particular configeration so they can determine how to fix it.
I've been using it for the last couple of days and it is great. None of the second party monitor programs are configured to pick up data from it, but it provides a lot of data itself.