Dear Rohit,
The following is one of the many many mirrors available to download Gentoo. The Live CD is general "x86" CD, and the packages CD is available for x86, i686, pentium 3, pentium 4, and athlon-xp.
http://cudlug.cudenver.edu/gentoo/releases/x86/2004.1/livecd/install-x86-uni... http://cudlug.cudenver.edu/gentoo/releases/x86/2004.1/packagecd/pentium4/pac...
Regards, Rajen.