I am using windows Vista and I installed Xming as you said and I want to use this AWESOME feature
I dont know what to do with the Xming I installed to connect after that from the N900 ?

I type the command ( ssh -X username@ipadress 'x2x -south -from :0.0' )
but it tells me Connection timed out and sometimes Invalid argument

PS: I have Openssh server and client, rootsh installed