password protection on \\.psf\Home\Desktop

Hi, I have a folder in my \\.psf\Home\Desktop that I would like to password protect on both the Mac and Windows side of parallels. Just wondering if anyone could offer any tips?

I've looked at lockdown on The Mac side but that still allows the folder to be opened and read. I need it completely locked so that you need a password to even open the folder.

If this is achieved will it cascade down to the Windows environment or is it just a case of having a password to ulock the PC?

Set up is OSX 10.5
Windows Vista Business

TIA

Mark