who sais u cant use NMAP from a command line??? just install winnmap from the nmap site and u can run it from a command line. I must not understand ur situation though...why if u have a GUI would u wanna use the command line? But yeh...just install nmap for windows and u can use it from command line...i do it all the time. Example would be like

C:\nmap -sT -vv xxx.xxx.xxx.xxx


works for me...hope this helps?