type cd.. in the comand line until you are back at D:\\ or whatever your Harddrive is.
you need those two periods after cd
Then type \"cd\" then the path to where the .exe is for the game. For me i would type \"cd D:\\Program Files\\PlaneShift\\psclient.exe\" yours should be similar to this. Then once you get PS loaded to the menu screen exit PS and you will see the cmd line again! with all the helpfull info!
Glad to help!