[rhn-users] Out of space kernel upgrade files to delete

I need to update my Kernel but /boot does not have enough space. I'm sure that some files in this directory are old and not needed but would like some recommendations.

Is it safe to delete files below since my current kernel is 2.4.18-17.7.x

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lrwxrwxrwx 1 root root 14 Jul 13 2002 kernel.h -> kernel.h-2.4.9
-rw-r--r-- 1 root root 405 Jul 13 2002 kernel.h-2.4.9
-rw-r--r-- 1 root root 406567 Jul 13 2002 initrd-2.4.9-34.img
-rw-r--r-- 1 root root 13599 Jun 1 2002 module-info-2.4.9-34
-rw-r--r-- 1 root root 438900 Jun 1 2002 System.map-2.4.9-34
-rw-r--r-- 1 root root 976110 Jun 1 2002 vmlinuz-2.4.9-34
-rw-rw-r-- 1 root root 406712 Apr 11 2002 initrd-2.4.9-31.img
-rw-r--r-- 1 root root 13599 Feb 26 2002 module-info-2.4.9-31
-rw-r--r-- 1 root root 438666 Feb 26 2002 System.map-2.4.9-31
-rw-r--r-- 1 root root 975103 Feb 26 2002 vmlinuz-2.4.9-31
-rw-rw-r-- 1 root root 405637 Nov 3 2001 initrd-2.4.9-12.img
-rw-r--r-- 1 root root 13598 Oct 30 2001 module-info-2.4.9-12
-rw-r--r-- 1 root root 438077 Oct 30 2001 System.map-2.4.9-12
-rw-r--r-- 1 root root 980299 Oct 30 2001 vmlinuz-2.4.9-12
-rw-r--r-- 1 root root 390878 Sep 23 2001 initrd-2.4.3-12.img
-rw-r--r-- 1 root root 512 Sep 23 2001 boot.0802
-rw-r--r-- 1 root root 397053 Sep 23 2001 initrd-2.4.2-2.img
drwxr-xr-x 2 root root 12288 Sep 23 2001 lost+found
-rw-r--r-- 1 root root 13598 Jun 8 2001 module-info-2.4.3-12
-rw-r--r-- 1 root root 428192 Jun 8 2001 System.map-2.4.3-12
-rwxr-xr-x 1 root root 2178832 Jun 8 2001 vmlinux-2.4.3-12
-rw-r--r-- 1 root root 796703 Jun 8 2001 vmlinuz-2.4.3-12
-rw-r--r-- 1 root root 13598 Apr 8 2001 module-info-2.4.2-2
-rw-r--r-- 1 root root 410990 Apr 8 2001 System.map-2.4.2-2
-rwxr-xr-x 1 root root 2280836 Apr 8 2001 vmlinux-2.4.2-2
-rw-r--r-- 1 root root 781806 Apr 8 2001 vmlinuz-2.4.2-2