Install Navigator free on mio c250

Hello!!

I don't know if this is the best forum to ask this question but I tried on another sites and I don't had any answer....

Well, the theme is "easy", I have an OLD mio c250 gps device and I would like to install a free navigator with free maps. I know OSM and looks very good, and this program too on android. I thinking if is possible to install mapfactor free on my win ce 5.0 device, and this I will try to do it, but, is possible (or any easy way) to install it without use dangerous things like miopocket (I think is dangerous)???

Please, I need an answer to this question before start...

Thanks!!!