Maybe you all did not understand me and sorry for that. This is not a VNC or "Remote Desktop" problem as I will try to explain next.
If I have a monitor hooked to the video card at boot time, the system reads the monitor available settings and then I can change resolution with either VNC or "Remote Desktop" to whatever I want that the monitor and the VC support.
Now here comes the dig on this. If the monitor is disconnected from the VC and the system is rebooted, then there is no monitor settings to read and all that is available if the lowest WinXP settings. 800 by 600 I hope this can be changed, but I have not found out HOW.
Just hoping someone here might have a clue. Thanks in advance.