Or simply edit the /home/user/MyDocs/Drive/Maemo/settings.ini file
Look at
ResourcePath=/../../Res
MapPath=/../../Maps
Change it to
ResourcePath=/../../../Res
MapPath=/../../../Maps
Then move the Maps and Res folders from /home/user/MyDocs/ to /home/user/
and voilà you have Sygic on your /home/ partition
I have a 2GB MyDocs partition too and this is more livable for than a 2GB /home/ partion for me