So I'm really considering upgrading from Cakewalk Pro Audio 8.03 on a Windows 98 machine to Sonar on a seperate dual processor PC running Windows 2000. This would allow me to fall back to my old setup if I have problems by simply moving my Delta 66 card back and forth. My nervousness stems from the fact that I'm in the middle of a project, and I've read where people had issues with old projects when they went to work on them in Sonar. My main reason for upgrading is my inability to get the Native Instruments B4 to play nice with 8.03. I guess my questions are as follows: What are the issues with moving Pro Audio projects over to Sonar? Should I go all the way to the latest Sonar patch? Any advice on the pitfalls of upgrading would be much apprecitated.