[linux-lvm] Installed the lvm on the Red Hat 7.1 then what to do now

[RAGHVENDRA SHUKLA <rshukla prl ernet in>]

Hello ,
        I have installed the lvm in the Red hat 7.1 ( kernel 2.4 , with
        kernel enabled as lvm ( in kernel ) , installed the lvm , also
        created one physical volume , But i am confused as my df gives 
      
    Filesystem 1k-blocks Used Available Use% Mounted on 
        /dev/hda5 4870252 3272660 1350196 71% / 
        /dev/hda2 23333 2468 19661 11% /boot
	/dev/hda6 2624792   2124756    366700  85% /var 


is i will be able to change the size of / or /var or /boot partition,
are they hardcore partition . What i want is  i want to make
/home , /var , /boot ,/ all resizeable , please clearify. I am confused


Regards
Raghav