Yes you can but as with a Lan Runtime - if you open P5 and it doesnt find the CD or the Lan Disk - It will forget that you had that runtime there (if you have remember last, anyway in preference) and next time it opens - you will have to re-add the runtime. I have a very fast lan connection and basically just me running 3 machines with 100m and it is a dog to open my PPP runtime on my old machine. I got the pboost program and it is a lot faster and doesnt eat tons of my memory to grab the PPP files over my lan.