Go to Yahoo.com and search for "Graphic Workshop". You should end up with a link to Alchemy or something like that. This program will convert formats and scale anything very well. I have used it for many years. It's shareware so it is free for at least 30 days.
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My '98 Vegas Pony
'98 Rio Red Clearcoat Convertible GT
Full black leather
K&N Filter
Kenny Brown Extreme Matrix Kit with Super Subs