I really should really write this stuff down...

I'm trying to install 2012 SP3 via admin image - and it's failing at 50% - i'm pretty sure due to Toolbox. (infamous 1603 error)

We maintain previous versions at all times, and therefore need to keep a networked Toolbox location for each version.

I think in the past i've installed the toolbox onto my C drive, then copied those files to the network location, then copied the 2011 part data overtop of the 2012.

Is this the best/preferred way to accomplish this?