I have to send my new (3 months old) computer in for repair.

Bad MB and/or video card. I am going to be without it for about 2 weeks. Unfortunately for me, I run my business from that PC, and without it, I'm out of work.
My first instinct was to purchase an external HD. Seagate puts out the FreeAgent, which comes with Ceedo, and has Argo available. The concept is perfect. Run my entire desktop from the External drive, and when I get my PC back, I can unplug it from the borrowed PC or notebook, reload it into my computer, and it leaves no trace of itself on the borrowed PC.
Unfortunately, my business app doesn't run on Ceedo or Argo.

So now I'm back to square one. Are there other external drives thatcan run like the Seagate FreeAgent?Does anyone have any other options for me? Thanks.