I lost my leopard DVD and tired to download the whole image and start update from 10.5 to 10.5.4 step by step.

Can I install leopard using JAS's DVD?

Will finally use rEFIt to multiboot. Or are there any trimed version of retail OSX for easy sake?

Thanks.

You can't use OSx86 DVD llike JaS, iAtkos etc on a genuine Mac. Cause it's not built for them but for Intel CPU based and PC hardware. Better to go on green demon and download the image of Leo

thanks for your reply.. May I know if there are 10.5.4 or 10.5.3 Retail DVD on Green?
Or I must start from 10.5 and upgrade one by one?

no problem. First, Apple didn't update his installations discs like Windows. SO you start at 10.5 and you upgrade litteraly to 10.5.1 etc.

Mac OS X 10.5 retail disc on green demon