As far as I can know any socket P processor will fit in the Celeron's micro-FCPGA socket, but not vise versa. In that regard, you're safe. However, the Core 2 requires far more power than the Celeron, and has a TDP of 35W, whereas your Celeron has a TDP of 26W. If the BIOS even recognizes the chip, you're in line for cooling problems. I wouldn't try it.