It's easier to set up a tcp/ip printer to the cups server.
Add a network printer> http printer in winXP for the correct ipaddress
and use port 631 (for cups print server).

On Wed, 2011-06-29 at 15:37 -0700, Yasha Karant wrote:
> Is anyone using Virtualbox 4 on a SL 6 x86-64 host running a MS Win
> XP 
> Pro guest (presumably IA-32)?
> 
> If so, has anyone successfully gotten MS Win to recognize a local 
> printer attached (and working under CUPS) to the SL 6 host to print to
> it?
> 
> I am trying to get Samba running on SL 6 to do this; it worked fine 
> under VMware Workstation on RHEL 5 (CentOS 5).   I have installed two 
> virtual NICs under VirtualBox, one configured NAT, the other host
> only 
> adapter, and have checked for the IPv4 addresses assigned to both the
> SL 
> 6 side (vboxnet0) as well as on the MS Win side (via ipconfig under
> the 
> command prompt window).  I can ping from the MS Win side to both the
> MS 
> Win host only IP address and to the SL 6 host only IP address, and
> can 
> ping from the SL 6 side to the SL 6 host only address but not the MS
> Win 
> host only address.