Changin Options once a campaign has started

[rickedd]

Hi Guys

Could someone please advise me if there's any way to change the gameplay options from say easy settings to medium etc once your'e into a campaign.

for example I am many many days into the campaign and I want to change say limeted fuel and limeted compressed air now that I have got used to the game I find it easy and want to increase the challenge but not have to start the full campaign again.

I am hoping this could maybe be done by editing a file maybe...

thanks in advanced
Rick....