Just convert it to a .jpg. Open it with microsoft paint, then click "File", then "Save As", then where it says "Save as type" select .jpg and you're all set.
Windows 98?!?!? I am insulted. Yech, that OS was a POS. I am running Windows 2000 Pro. As far as I am concerned, it is the most stable Windows OS out there.
I guess I should have added a wink too. I am in the computer networking industry, and I can tell you that Windows 98 is a terrible OS for networks. It is barely okay for home usage with no networking.
I'd agree with that Evan Win98 was a POS. Win2kPro is much better especially for networking. I upgraded to WinXP Pro which I prefer to Win2kPro even though it is a little less stable.
Here is mine. Taken at Leuchars this year (Resized and adjusted in Photoshop to brighten it). Spitfire MKXVIII of the Aircraft Restoration Company low level pass.
It'd look a lot better if had a newer video card. Those are about the best graphics I can get from this old girl and still be able to play the game with little to no stutter.