Disabling HT won't speed up renders. Those 50% Task Manager reports are misleading. Hyperthreading works as follows: a Pentium 4 consists of several arithmetic units that can work in parallel. Now if Poser is rendering, some of those units are kept busy, and some others may be idle for short periods. In a non-hyperthreaded CPU those idle units remain idle. In a hyperthreaded CPU, those idle units get instructions from another process to execute. Overall performance of a hyperthreaded CPU is somewhat higher (5-15%, depending on the processes it must run) compared to a non-hyperthreaded CPU. And the main advantage of a hyperthreaded CPU is the better responsiveness of the system under load. Switching off HT doesn't speed up your render in any significant way. Less than 1% in my experience (yes, I've tried and timed). Switching off HT does result in a system that is much less responsive when doing heavy work (like rendering).

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

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