virtualbox 3.2.0

windows guest 64-bit cpu configuration
plop boot manager for usb don't work (I use boot.ini to direct the plpbtldr.bin ) , I got 100% cpu usage (25% on my  athlon x2 630 quad core) , while vmware works !! <------ this time it is great !!!
ps, I use http://download.plop.at/files/bootmngr/plpgenbtldr-0.7.zip

and grub4dos 0.44 (I use boot.ini to direct grldr) , the command 'map --mem  '  (memory mapping) remains buggy
I can't use it with a success , as I can remember , doesn't it works in previous versions ?????
 or I remember it wrong ?