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...and patch the single byte to prevent copy protection
see subversion links with code and this post: http://forum.stunts.hu/index.php?topic=2454.msg43618#msg43618

. some further analysis reveals the the output game.exe from the above program is compressed with exepack, as with load.exe.

to remove the copy protection, uncompress with unp and put a byte 0x1 at offset 0x2b3c

I'm not sure in which file.
But it seems like 1 file for the copy protection
And if it's another file load.exe that needs repack.

So 2 files to alter for option C
(Unless I totally missed something)

Although I can follow the conversation I'm not going to attempt to make these changes. Not comfortable with this level of editing 

Edit: missed end quote...

True. But in de end you only have (modified) original files. So basically what you had on the disk.
Feels most authentic to me.
Copy protection is outdated, nobody cares (probably) and it's a nuisance.

I don't know what the others think about this.

Option A doesn't feel right. It fixes the problem but a crack is still needed.

Option B is kind of what restunts does. So we already have that.

Option C is most appealing to me as it fixes the issue and the need for a crack.

Of course this all only matters if you want to play without emulator.

the primary problem that there is no clean official package that solves such problems for everyone - time to speak to Kalpen to update the package

You mean a repack of the original files that are clean but keeping as much in tact as possible (except copy protection) ?

It was the sound.
ran setup and disabled sound, no problem. on PC speaker also no problem

so stunts runs. problem solved.   [EDIT]  runs in MS-DOS. [/EDIT]
next stop, getting sound...

NB: haven't done sound config in dos on 25 years or so.,. and never on a "modern" laptop.
modern is relative here since the laptop was designed for windows XP

to be continued....

EDIT::
sound not supported in dos, not possible either according to internet. Chipset not reverse compatible.
I'm gonna put this project on hold for now..

All my stunts versions are from kalpen.de or except for the competition version.

But maybe it crashed on sound. I haven't setup a sound driver but maybe the copy of Stunts is looking for it. Will look into this later..

I'm a bit confused. (Don't worry, I'm used to it)
The cracked executable gives problems, that's understandable.
Restunts game.exe runs fine everywhere (dosbox, freedos and MS-DOS)
The original executable stunts.com won't run in freedos or MS-DOS either.

That is my experience, so there's a difference in the way the program is executed.

.... I'll get back to this....

Works with all versions except 1.0 in dosbox.
Works with fresh freedos (game.exe at least) on my laptop. (1 of them)
ill have to work on the sound

the funny thing is that i had the errors with the original executable to.
I checked that.

Does it matter which version of Stunts I use with these files?

I've done that and just did it again to be sure.
Boot's fine,
First try a packet file error.
With loadfix I get an io error. I starting to suspect it's a CPU that is not DOS compatible.

- so whats the problem?

I think mainly my poor understanding of DOS

Yeah, stunts is a pain to get to run outside a virtualized environment. But it was possible, so I want to make it work. (I'm so close)

Two Three thoughts.
Some games from the 640k era were later revived with a new memory handeling. (Dos4gw?? I believe)
Stunts missed that.

And I would like to know is restunts changes memory handeling (I am afraid not) because it bypasses load.exe..
See: http://forum.stunts.hu/index.php?topic=2454.0

About the copy protection. Could we remove all the answers with stressed? Then no crack is needed..

I made a selection box around the car. (Sort of parking space, mainly because all car's are different) my selection tool in Photoshop gave it a 1cm with. So I doubled that for convenience. The other two happen to match this so I went with it.

I think that speed was adjusted to 'feel' right.

I've been thinking about this and about the physics of Stunts (the strange and buggy) Vs a real physics engine for your project.

Is it a idea to make both and make it a feature. (Simulation mode or legacy mode) like you could choose between simulation and arcade mode in old race game's.

I've noticed that freedos has 635k of conventional memory in stead of 640k in MS-DOS.

Stunts in VGA mode requires the full 640k to run

E.g. it seems that it isn't possible to run stunts in freedos unless this can be altered.

::Side note:: does 'restunts' have an effect on memory handeling?
Can't download it anymore so I can not test this.

If car width = 2
then road width = 10
and tile width = 40

pixel counting (rounded)