Here is a short and simple -bigadv tutorial. Basically it's the same as the SMP tutorial except a few added steps. Here is the LINK
for the SMP tutorial straight from the F@H page.
1. Passkey is needed (see tutorial on how to obtain)
2. When you configure your client make sure you:
a. Select "big" as your acceptable size of work assignment
b. Do not enable the -advmethods flag
3. Place the -bigadv flag on client shortcut.
Follow steps 2 and 3 as seen here:
Note: You need to have least 8 CPU cores in order to qualify and receive -bigadv work units (WU). Intel i7 9XX and 8XX processors qualify because of their 8 total threads. Minimum OC to 3.6 Ghz to qualify for the early completion bonus. I highly recommend that your OC be stable because F@H will stress your rig
If you need further assistance PM myself or BUCK_NASTY