I seem to remember some LucasArts games not wanting to install to any drive letter except C:. By any chance did you pick a different drive letter before you got to the install size option?

You could also try copying the CD to HDD and using FakeCD to emulate the CD-ROM - maybe that would trick the installer into stop being a jerk and do what it’s supposed to do! It’s a lame attempt at copy protection I suppose.

Maybe tell us a bit more about your system setup. Operating system, drivers loaded, etc.?
What other hardware have you got installed in your system?

The drive letter of the CDRom drive shouldnt be too high (I dont remember the exact letter). But assuming you get it installed (from D: to C:, for example), afterwards you're free to go.

The Collector's CDROM edition does create a TIE.CD file on the drive you install too. If you move the game afterwards to regardless where you just have to make sure that this file is located at the root directory of the drive you are running it from. Then you're golden.

Only have a C drive, and as mentioned before, both Dark forces and X-wing installed no problem.

It's an Ibm Valuepoint 6482 with a Intel 486 DX4 100Mhz processor.
Integrated S3 graphics which I have upgraded from 1 to 2mb

Doesn't have any L2 cache, as I can't find correct chips to use.
Those I have tried have failed.

Is a Vlb/Isa system, and has a 3com 509 network card, that is not configured, but has a XT ide chip on it to run the 16gb SD card.
As bios won't recognice such a big drive. It has the latest bios update I could find.
Can't remeber name, but it is 81 something.

CD-rom connected as slave, and on second channel is a Zip 250 drive, that I load guest.exe when needed.
It is the D: drive.

There is a MPU-401 clone with a MT-32 connected to it for now, and a AWE 64 gold.

Tried a few different cd-drives, but XT-Ide would lock up when connecting them.
Mostly DVD drives, and 1 cd burner with a caddy.

After posting this, I also tried a good number of different games. All original, and all installed well, apart from Flying Corps.
It ask question if this is Flying Corps cd-rom, over abd over again, and had to shut it down to get past the error.
Looking again, its specs claim a P1 90MHz as minimum, so it's unlikely to work anyway.

I will look into FakeCD and see if that works.

Edit: Forgot to mention, but running Freedos 1.2 legacy with fat32 filesystem.

Don't get far enough to install anything, so don't tie.cd would be copied over yet.
It's a new install, so not moved anything from a previous install.

You could try a different CD driver for DOS. I had similar problems once that went away by using oakcdrom.sys.

Tried both possible solutions.

Install crashed when trying FakeCD both with oak and native cd driver.

Installing from cd-rom with oak, I get the the same errors.

One thing I noticed now, is that there is an uninstall option that cAn be clicked, so apparently installer think it is already installed.
It isn't, and I even searched for tie.cd on c: drive, and it is only found where I copied the tie cd-rom.

Try clicking the uninstall option..? Check the root of c: for hidden folders. It won't install of course if it thinks the game is installed already.

If the TIE.CD file is present on one of the drives, the installation will also be marked as completed.

I have tried that, but as there is no folder with Tie fighter installed, it fails.

TIE.CD is present when I copied cd drive to hdd, to get FakeCD to work.
It is not an install, and it was the same behavior before I copied it over as well.

Will google about hidden folders, don't remember dos that well anymore.