The above instructions will only work for Revolutionary rooted phones. I'm not familiar with the Goldcard way of rooting phones; it's probably conflicting with the Revolutionary root. If you're using the SD card with the Goldcard on when carrying out the above, that might be causing a problem. Try a fresh SD card for the PG88IMG.zip. But, again, there might be a conflict that's preventing that. Are you trying to install an RUU.exe or are you flashing an RUU ROM.zip? It might be that you can get to where you want via the Goldcard, but it does say Revolutionary on your boot screen so I don't know how that may affect things.