Perfect! Mounted it as following:

mount c c:/
c:
cd synd/save

... and created the above folders. Now saving works like a charm. Really nice!

can someone tell me tricks for the game?

BTW, does someone know any special parameter that you can enter so you won't have to see the intro movie when you start the game?

I'm not sure if there's one at all, but try synd.exe /nointro or synd.exe - nointro ?

1) Tricks for the game?
In what direction were you thinking, what aspects are you having trouble with?

2) Skipping the intro?
For me it works to press spacebar.

Yeah for me too, but what I meant was to skip it alltogether meaning you enter the menu right away. Because when I press spacebar to skip the intromovie it has to load about 6-7 seconds before the menu comes up which is a bit annoying in the long run.

Then increase the CPU cycles and see if that helps. Should actually. ;)

Well, won't that increase the speed of the whole game? Because the game itself right now runs in a speed as it is supposed too.

Increasing the number of CPU cycles shouldn't change anything about the game speed, except if the initial number was too low (which would then cause the game to lag a bit). It could help for the intro skipping though.
I never needed more than a second to skip the intro and get to the main screen, but I run main.exe instead of synd.bat
However I have no idea if this is possible with the version here on abandonia, if those files are included there as well.

It would be the same difference as between a 486DX2-66 and Pentium 133 - the difference in speed in the game won't be any noticeable, but the loading of parts of the game would be quite faster. ;)