You could just rename it, change the file extension. Some players will fall for that, others require to actually change the container. You can do that using Avimux_Gui.
Aiseesoft Total Video Converter. Works flawlessly. You can even configure the amount in % CPU that the program will use
I see you're in love with Aieeeesoft , however, this one needs no conversion( which would mean loss of quality). Changing the name or repacking will most likely suffice.
yeah, I actually just got the program today. Agreed, changing the file extension would probably work as well.