almost there

[lucas]

hi... sory, i do not have much time to use my computer lately. i'll try 
to explain what's going on my
notebook.
my notebook is an toshiba A20, 256mb ram, hd 40 ide..
let's start.. i put the cd (i made the download here: 
ftp://ftp.freebsd.org/pub/FreeBSD/releases/i386/ISO-IMAGES/5.3/5.3-RELEASE-i386-disc1.iso 

and here:
ftp://ftp.freebsd.org/pub/FreeBSD/releases/i386/ISO-IMAGES/5.3/5.3-RELEASE-i386-disc2.iso 

) inside my drive. and restart the computer.
first i chose the option number 6,
and i set this option: "set hw.pci.enable_io_modes=0",
and boot.
the boot starts normally, until this:
acd0: CDRW <TOSHIBA DVD-ROM SD-R2412/1330> at ata1-master UDMA33
acd0: TIMEOUT-READ_BIG retrying (2 retries left)
acd0: FAILURE-READ_BIG timed out
acd0: TIMEOUT-READ_BIG retrying (2 retries left)
acd0: FAILURE-READ_BIG timed out
acd0: TIMEOUT-READ_BIG retrying (2 retries left)
acd0: FAILURE-READ_BIG timed out
acd0: TIMEOUT-READ_BIG retrying (2 retries left)
acd0: FAILURE-READ_BIG timed out
 at this point the sysinstall starts...
on the sysinstall main window, i choose the Standard option.
i choose the partition to install...
the BootMgr...
on the FreeBSD disklabel editor, i use the "A" option, for defaults...
on the "Choose Instalation Media" (the problem is here), i got this 
message:
  Error mounting /dev/acd0 on /dist: Input/output error (5)

that's it... what can i do? anything else you can send an email.. ok, 
thanks..
 sory about my bad english...