Welcome to the forum sandbag11
The answer is Yes and No...
If you modify the correct bridges on the Duron you can enable MP as long as they are not Spitfire Durons (~5 or 600-950 MHz I think) but there is no real garantee that it will work properly. I would gather that it would be more of a headache to do this then getting regular MP Athlons.
But if you just want to mess around with an MP system then you could pick up 2 AMD Athlon MP 1.2 GHz, 266MHz FSB, 256 L2 Cache Processors from newegg for $70USDMP 1.2 GHz
Hope that helps
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