I have done this myself with AutoCAD. What I do is copy the file to my laptop, or now days to the USB memory stick (for working on the home PC) and then start a new AutoCAD drawing. I then reference the copied file to my new file, and begin designing.
When I get back to the office, I take the data in my new AutoCAD file and copy and paste it into the file that is on the server, (using copybase at 0,0) so any changes that were done in my absense are not over written.
This process is quicker than remote dial up, and you don't have to worry about getting a connection or lines down etc...
USB memory sticks are about $40.00 and connect instantly. Mine holds 128MB.
Hope that helps,