Hi, welcome to bleepingcomputer.
The Intel 865G onboard video is limited, and you may not be able to achieve exactly what you want, even with the monitor "driver".
The limitation is the Intel chip's 3D resolution support, which according to its technical documentation is 1600x1200, even though the RAMDAC can drive 2058x1536. So normally the driver limitation will come up as 1600x1200 and hence the limited choice of resolution was a common complaint about older Intel integrated video. Also the potential resolutions flagged by the monitor via EDID (Extended Display Identification Data) may not be recognised, but Intel only created updated drivers to deal with this for the 945 and later chipsets.
So you may need to compromis with a non-native resolution - the resolutions that most closely preserve the screen aspect are 1600x1024, 1440x900 or 1280x800, so try any of these if they are available. If they are not, installing the Acer driver may make some or all available.
Alternatively, you may want to look into a replacement video card - almost anything will provide higher performance and greater capabilities than the onboard Intel, which is really business application oreintated.
Edited by Platypus, 31 December 2007 - 04:48 AM.