Help trying to create a \\SIMULATION

Hi,
Best I describe what set up I have first before I explain what help I need.
I have a simple network with 3 x computers running windows 7, and all my data stored on a Buffalo NAS which I'll refer to as \\TSSTB on the three computers (the network name of the NAS is obviously TSSTB).
Each computer has a FE of the access 2003 database, the BE is on the NAS.
This works great, as all 3 computers use the NAS for data storage / sharing.

Here's what I'm after.

I have a laptop where I have a copy of the FE of the database. I wish to be able to use the laptop to have a back up copy of the content of the NAS, so that I can experiment with changes without impacting the real live data. I don't want to buy another NAS to do this, is there any way I can refer to a folder on my laptop as, say, \\TSSTB so that my FE can read the BE data from the copy of the database ?

Cheers for any help,

Graeme