Folding on an old P4 socket 478

I have an old machine with:
P4 2.4 socket 478
945 express chipset Intel Board
2 GB ddr 2 667 Ram
80 GB 5400 IDE
Windows XP
stock cooler


It's been gathering dust and I was thinking of putting it to use by installing Folding @ Home on it.

Now

With my current rig:
core i5 2400
DH67BL mobo
Corsair 4 gb 1333 Value select
500 GB sata 7200
Sapphire HD 6670 I GB DDR5 (Core oc'ed at 845, Memory at 1150)
Windows 7 Ultimate 64
stock cooler

For folding, when I run GPU and SMP together, with 2-8 threads on the smp and cpu utilization cut down to 30%, I still get CPU temps in the 70-74 C range. I have disabled the smp slot for now until I figure a way out (planning on a hyper tx 3 evo)

Since I cannot monitor my temps on the p4, will it be a good idea to use that machine for folding in the first place?, are there any folding clients that address this?

Thanks

-Satyam