I know it says it's for Linux, but lower down it mentions:
"Interestingly on Windows XP SP2 the fan can be throttled with the Software Notebook Hardware Control (NHC click here) using its ACPI Control System. So it is possible to control the fan via ACPI, but somehow something on Linux prevents this from happening."
Don't think there'll be an overheating danger as it's only likely to make a small reduction to the fan speed (CPUs are also tougher than you think). You can frequently monitor the program's settings & temperatures(?) - see this page for details click here (& click on the headings to expand). G
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