[_Odyssey]

I've not heard of anyone editing a s1clone image, probably because it's a relatively new program. But i doubt that you can.

If you're using Windows XP all i can suggest is to increase the 'paging' file within Windows by right clicking on 'My Computer' and selecting 'Properties'. Then click on the 'Advanced' Tab and where it says "performance" click on 'Settings'. Next click on the 'Advanced' tab and at the bottom of the window you'll see 'Virtual Memory' and what it's currently set at.
You can increase the size of Virtual Memory that windows uses by clicking on change. Now it really isn't recommended to change these settings but as long as they're higher than what is already set should be ok.
Before you do this though, you should also check to see how much free HD space you have.

All this may make no difference at all. If you're not comfortable/confident changing the values of Windows Virtual Memory thats ok and we can look for other options.