Crystal clear!
thank youuuu..!!

Though another Q if possible..

i've done the following:

yum install kernel-pae

vim /etc/grub.conf
#outputs the following:

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd0,0)
#          kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00
#          initrd /initrd-version.img
#boot=/dev/sda

default=0 #############BOOTING with PAE for additional RAM on 32 bit######
timeout=1 ###speeding things up######
splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title CentOS (2.6.18-194.11.3.el5PAE)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-194.11.3.el5PAE ro root=/dev/VolGroup00/LogVol00 rhgb quiet
        initrd /initrd-2.6.18-194.11.3.el5PAE.img
title CentOS-base (2.6.18-92.el5)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-92.el5 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
        initrd /initrd-2.6.18-92.el5.img


After booting, the system hangs on:

"Memory for crash kernel (0x0 to 0x0) notwithin permissible range" for about 2 to 4 minutes.
and then continue booting with the following marked as failed:


1. Mounting HGFS shared
2. VM communication interface
3. VM communication interface socket family
4. blocking file system
5. Virtual printing daemon

Are there related errors to PAE itself, or is it just that VM tools do not support PAE kernel?