Don't forget you can custom install only the older effects and synths from earlier versions of SONAR.  Mondo didn't have to install SONAR 7 - just the missing plugs.

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For my situation, this is a new laptop and I have only installed X1d and haven't thought about what I will want to install from Sonar 5.2PE or my P4 XP setup. My desire is to organize my programs on C, CW projects-audio on D (internal and seperate 2nd drive), and libraries and backup audio on my external usb3 port/usb3 drive- H and I respectively. My ASUS G74sx has 4 usb ports, one of which is usb3, with 2 internal drives, each 500gb 7200rpm. The ext is 1Tb 7200 usb3. I am planning to build a new desktop in Dec-Jan for my main studio PC, so, the laptop is for winter time travelling, so I can still record-work on my music. I haven't done any networked PCs, yet and am reading up on that. Mostly, I want to efficiently install and use these new large libraries and explore that world, more(libraries and networked PCs). Coming from 49 years of pro guitarist and studio operator -13years of CW studio,  I know "a lot" about editing, recording and mixing on PC, I know much less about the internet and computers in general. I am catching up as fast as I can, jumping from S5.2PE and P4-XP (3 drive setup)to 64 bit Win7HP quad i7 and now X1d PE expanded .......soon to X2! Thanks for any advice-direction. Michael

To confirm what folks are saying SONAR X2 will be a separate install and does not require a previous version to install/run. For even more clarity, SONAR X2 installs to a separate directory. Some folks like to have the current and new version on the same machine as they migrate over to the new version. In addition, when installing SONAR X2 onto a machine with SONAR X1, preferences and directory settings can be migrated over to SONAR X2.

RE bringing instrumentals and songs from Sonar 5.2PE on my old P4 XP to X1 64bit and Windows7 on my new laptop. Since mine are all on a seperate PC and I am thinking I will save them as bundles and move them one at a time considering as I do whether to let go the old effects/plugs and learn to use the new ones. I guess I could print the tracks with and without plugs and compare.
     It certainly was exciting to watch the CakeTV today on X2 and I do feel very motivated( and I have finished up lots of outdoors projects on my new house, so I am free-er to spend more time on the studio)