Thought id update my post ive actualy found a fix that works.
eint that just typical after posting for help ^^
I found it on this web site :
http://forum.nfsunlimited.net/viewtopic.php?t=14314
i downloaded Need For Speed: Most Wanted Windower
and changed the included settings.ini
to my needed specifications which are :
WindowSizeX=1366
WindowSizeY=768
StartupX=0
StartupY=0
ShowCursor=1
ShowBorder=0
UseModLoader=1
(These settings are found at the bottom of the included settings.ini file)
After i changed these and created a shortcut of the Loader.exe onto my desktop.
after clicking on the loader.exe my PC Game need for speed most wanted v1.2 now plays in full screen mode (Sorted!)
All kudos to Wiccan creator of this tool. good work!
I hope others benefit from this like i have.