my PCLOS gives only 800x600 resolution
 

Is PCLOS Minime supposed to have only 800x600 screen resolution? That's the only resolution mine can get when configuring the desktop. My other distro, MEPIS 8, offers up to 1024x768. I hope this isn't normal, because I'm not settling for an 800x600 display on a monitor that can do 1680x1050.

You probably need to edit /etc/X11/xorg.conf to specify the correct video driver and other things. One way to do this is to run xorgconfig in a terminal.

What is your video card?

I would have thought that PCLOS would automatically do all this, but perhaps not with "Minime"

Okay, I just dug out my motherboard manual. (I don't run anything graphics-intensive, so I didn't buy this mobo for its graphics card, and wouldn't remember what it is. All I knew was that it's integrated.) It says the graphics card is a GeForce 8100 chipset. 512 MB memory.

My xorg.conf file says:

Section "Files"
# font server independent of the X server to render fonts.
FontPath "unix/:-1"

# minimal fonts to allow X to run without xfs
FontPath "/usr/share/fonts/misc:unscaled"
EndSection

Section "Extensions"
Option "Composite"
EndSection

Section "ServerFlags"
#DontZap # disable <Crtl><Alt><BS> (server abort)
#DontZoom # disable <Crtl><Alt><KP_+>/<KP_-> (resolution switching)
AllowMouseOpenFail # allows the server to start up even if the mouse does not work
EndSection

Section "Module"
Load "dbe" # Double-Buffering Extension
Load "v4l" # Video for Linux
Load "extmod"
Load "type1"
Load "freetype"
EndSection

Section "InputDevice"
Identifier "Keyboard1"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
Option "XkbOptions" "compose:rwin"
EndSection

Section "InputDevice"
Identifier "Mouse1"
Driver "mouse"
Option "Protocol" "ExplorerPS/2"
Option "Device" "/dev/mouse"
EndSection

Section "Monitor"
Identifier "monitor1"
VendorName "Plug'n Play"
ModelName "G2016wa1"
HorizSync 30-83
VertRefresh 50-76

# TV fullscreen mode or DVD fullscreen output.
# 768x576 @ 79 Hz, 50 kHz hsync
ModeLine "768x576" 50.00 768 832 846 1000 576 590 595 630

# 768x576 @ 100 Hz, 61.6 kHz hsync
ModeLine "768x576" 63.07 768 800 960 1024 576 578 590 616
EndSection

Section "Device"
Identifier "device1"
Driver "fbdev"
Option "DPMS"
EndSection

Section "Screen"
Identifier "screen1"
Device "device1"
Monitor "monitor1"
DefaultColorDepth 16

Subsection "Display"
Depth 8
Modes "1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
EndSubsection

Subsection "Display"
Depth 15
Modes "1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
EndSubsection

Subsection "Display"
Depth 16
Modes "1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
EndSubsection

Subsection "Display"
Depth 24
Modes "1600x1200" "1280x1024" "1024x768" "800x600" "640x480"
EndSubsection
EndSection

Section "ServerLayout"
Identifier "layout1"
InputDevice "Keyboard1" "CoreKeyboard"
InputDevice "Mouse1" "CorePointer"
Screen "screen1"
EndSection

What information am I missing?