1. what media source did u use for installing fc4, say: iso's from hd or burnt files from cd's/dvd's or from an ftp server??
2. when did "kernel panic" strike u, right the at moment of ininiation of the anaconda installer or of booting after an isntallation?
1:for easier manipulations, pls install via cd's/dvd's
2: kernel panic is always caused by the failure in the system's attempts to inspect the hardware configuration and driver them into action and mounting the ext2/ext3 file system
3. try to check your hard disk geometry and find out whether there's something wrong your boot loader or grub conf and the file systems
4. search online for tips
try more and good luck