Security

(1) I have DOS business software running in WIN XP. I connect with my XP laptop on the road to this work XP computer. Since Win XP will no longer be supported come 4/8/14, I've read Greg Shultz' s 5 articles from summer, 2013 about running Win XP inside a remote desktop setup on a WIN 8 machine.
If I buy new WIN 8 machines (3 work machines and 1 laptop) and set them all up with WIN XP running as a remote destkop as Greg describes, can I then connect from the laptop on the road to my DOS programs running in XP at work--have a virtual machine within a virtual machine?
(2) If so, will the connection have WIN 8 security?
(3) Will I be able to use my HP Laserjet 4000 printer at work with its PARALLEL PORT connection?
Thanks for any help.