Thanks A LOT to everybody in the forum, especially Cat_7 - you were of great help !
Just successfully set up a virtual successor for my beloved but outdated and defunct G3 Pismo - on a Dell e6400 with Win 7 Pro (my present employer requires use of Win machines).
Download and installation of the files provided at the indicated places was straightforward, the instructions are mostly excellent. One bit of information could use a more prominent place: How to very easily get a running system from the >PowerBook HD.img< on the recovery CD (just mount the image and copy all contents to the designated virtual SystemVolume). Before I found that hint in some older threads, I spent some hours with the installation CD - which, meant for different hardware, was not useful.
But there was and still is some trouble:
1) With the most recent version (Jan 2010) setting RAM to 256MB or more prevents the start of SheepShaver, and Win displays an Alarm >Cannot map RAM: No error<. With 128MB, SheepShaver starts, but crashes while booting MacOS. 64MB sometimes work, merely 32MB are stable - but then the OS will only run without extensions, and working with any application is nearly impossible, so that doesn't make sense. The 2006 version is much better: It is mostly stable up to 128MB - not luxurious, but quite good for what I need to do. With 4GB of physical RAM I would like to give more of that to the emulator - maybe eventually somebody finds a way...
2) The most recent version (Jan 2010) booted with the installation disk but reliably crashed on opening ANY application (SimpleText, System installer, ...). The 2006 version made no such trouble and installation was successful once I learnd the trick with the image file from the recovery CD. After the installation, the 2010 version runs, too - however, with the memory restrictions mentioned before.
The result makes me quite happy - I even found good old FileBuddy in the Web, so I can restore Type and Creator information on files that at one stage resided on FAT or NTFS disks.
Thanks again for a nifty peace of software!