^ If the icon is not appearing in the AltF2 then you dont know the exact name of the binary file. And if you dont know the name, then even terminal wont help. At least something appears if the file name is right. (Like in KDE a blue gear appears for firefox(in my case))
There are some programs whose name does not appear in the menu, so dont worry. AltF2 zindabaad. But this is uncommon.
First of all extract all the files in some folder. Like /home/shashwat/simdock/
then open terminal.
cd /home/shashwat/simdock/
open README file. This is
very important as sometimes some prefixes are used while installation and if you dont use them, then most of the time the app wont be working fine. Then do:
./configure (This checks for the neccessary dependencies)
make (This compiles the various files using compiler in your PC)
su(or use sudo if su doesnt work) make install (This installs the files made in the previous step)
Hope this helps. You get those errors because the location you gave was wrong or you might not have extracted the files.