Eros, you're aware you're running the Unicore client for the CPU, right? That will only use 1 of your CPU's cores. If you want to really
push that CPU, get rid of the Unicore client, and us SMP instead:
Now to answer the original question. You are
able to change the background, Folding@home logo, and nVidia/Radeon logo for the GPU client. Simply open the install folder, and go into data_nv/data_ati and edit the files. You're not able to change the style of the protein however.
Also, as you've learnt, the Unicore client has a far simpler version of the viewer... we've been told the new client (out this week we believe) will have an improved version for both GPUs and CPUs.