First I would like to thanks you for the effort !!!!!

I tried to do the thing exactly as you've written here but it didn't work out for me, can anyone help me please?

I installed the Sygic program from ovi and then connected the n900 to pc, but unfortunately I couldn't find the sygic folder on my phone.
I tried copying the folders to the memory card, but the sygic program couldn't find them.

please help me get it working !!!!