"There are mounds on the case. What I don't have is fibre spacers between the screws and the motherboard"...

You don't need fiber washers. Normally the mounting of a motherboard in a case is not difficult. The motherboards rest right on the metal, but only where the screw holes are. PC manufacturers cut costs by eliminating screw in standoffs now. There are usually 5 or six mounting holes on a mini-ATX motherboard

Well I got the system to start up temporarily while it was in the case. Once I started inserting various cards(with the power off of course), it stopped working. I'm just going to chunk this case and get one from my brother that he's not using. I don't feel like having to deal with this every time it happens.

On a good note, while it was running, the system allowed me to activate the windows os over the phone. And since the motherboard came with a cd, I went ahead and downloaded the drivers. So the system works well, I just need to replace the case.

Sooo, for future reference to anyone that searches this thread, you can replace a motherboard and your OS will fire right up. You just need to reactivate the product key that came with the cd or is on the back of the case.

Good idea on using a different case. Still be careful to note the mounting holes though...

I have not used fiber washers in more than 6 years. It is important not to use to many fiber washers at one time. The motherboard needs to be grounded well to the case at several points. I have left some motherboard screws off though, at times. With the standard large ATX type motherboards getting scarce, and most OEM computer manufacturers going with the mini-ATX form factor PC's, there is not much concern with mounting a motherboard properly any longer. All my new builds are done using mini-ATX motherboards

New case comes with standoffs. We'll see how it works when I get it to the house. Kinda anxious to get this system running cause I want to try overclocking the processor.

Make sure the standoffs match the mounting holes in the motherboard and remove any standoffs that are not used under the motherboard. Standoffs outside around the motherboard can be left as is

The case is configured for ATX boards but has holes that look as if you can just take the standoffs out and reconfigure it for mini-ATX. Won't know till I get home.

Yeah don't worry, just reconfigure the standoffs to match the Mini-ATX board. Please remember to only install standoffs that match the holes in the motherboard. There may be one standoff that has no screw hole, just a pin that will act as a locator, to position the board. This standoff can be used or not

Runs great! Got the processor speed up to 2.71. Not bad for a 5 year old cpu. Thank you all for your help. It's much appreciated.