Hi Bert,
Sorry about doubling up on #5 and the other confusion. I should have proofread my work more thoroughly.
When I ran the default installation, I had SampleTank 2.5 checked and went with that. I didn't need to register Sampletank again.
I use d:\bb like you. Simply change the c:\bb and c:\Realband to d:\bb and d:\Realband.
I've just started up the USB drive and looked at the Custom Installation.

I've never used Custom Installation before but the configuration I have checked should be all that you need to install. It would be worth trying.
Hope this helps,
Noel