I'm currently atempting to physicalize my collection, by making covers and burning my games to DVD-discs. I want to burn Pillars of Eternity on two discs, but the game is splitt into three installer files. The first one is on just 2MB, whilst the other two are at 4GB + 2GB.

My question is: Can I just burn the fist and second installer on the same disc? Will the installation program/process register both files on the disk, and continue onwards until it hits the last install section (the 2GB-part)? Or do I need to use a seperate disc for all three installer files?

You should be able to arrange them in any way you like, really. I would probably use a dual-layer disc in order to fit the whole shebang on one disc. Or a USB stick, I've been looking for plastic cases for those but they're not very common.

Last time I checked, a GOG installer will not function correctly if all its files are not in the same location. Sure, it will ask you for the location of the remaining files, but even if you provide them correctly, it will still show up an error and refuse to cooperate.
¯\_(ツ)_/¯

So I can't splitt my installs up accross multiple DVD's? That stinks I guess, but at least my games are DRM-free, right? ;-) USB-stick sounds like a cool option, but that's expensive right? Probably hard to find the plastic cases as well, unless it's possible to order online, and ship them to Norway somehow?

Thanks all for the help btw! Appreciated ;-D

Sure you can, but in order to actually use them to install the game, you first need to copy the installer parts to your hard drive, and then run the installer. Ie. don't try to run the installer directly from the DVDs, if they are not on one DVD.

I find it a bit odd though you'd try to put games, many of which have never been released in DVD format, onto DVDs in order to "physicalize" them. I just download my GOG game installers on an external hard drive, and that is all the physical form they will ever need.

Well, I'm doing it mostly because I miss having my games in a physical CD/DVD-cover of some sort. I have 300+ games (if you include my Steam library as well), but I feel like I own nothing. There is no real trace of my collection. So I've set out to "physicalize" some of my most favoured games :-P

I am going the other way. I used to be a collector. Those days are gone, too much space taken up, too little quality put not packaging. Mostly it's just a plastic case with a disc contains steam now.
I have a raid setup of hdds times two and a backup drive. Sure, you don't get that sense of having things, but in most cases, and much more going forward you will see less of that anyway. We were discussing it earlier, rental tv, movies, games etc. At least now, when I run for the fallout shelter I only need to grab one small box :o)

Edit: not to mention keeping patches, mods, saves etc. Over time makes write once dvds totally impractical and read write discs more expensive and more prone to breakages, raid can save you on that. And with free file sync you can easily backup drives.

I tried doing this, but I missed the look of a physical library so I am enjoying the hunt as I look for big box pc games of yesterday :)

Actually I'm pretty sure you can, I just never tried to run an installation when the archives aren't all in one folder so I can't guarantee that it works perfectly with GOG installers.

For big games which exceed the storage capacity of a single DVD, either go for USB sticks, Blu-Ray, or some other high capacity storage media, or split the files up on multiple DVDs -- but as others have mentioned, you'd probably have to copy the files to your PC, before starting the installation. It's not ideal, but then again, how often do you plan to install and uninstall such big games? For smaller games ( most GOG games ) you should be able to fit multiple installers on a single DVD.

I never did that but actually I think that's kinda cool. I have more than enough stuff to put on my shelves but if I had the space I'd gladly create a library of physical copies of my GOG games just for the heck of it. And being one of only a handful of people with a pretty physical edition of a specific game is only a bonus in my eyes. :D

And fun fact: I *bet* many of the games you think never had a DVD release actually had a regional or otherwise limited one, for instance through Indie Box. Especially here in Poland all sorts of indie games have been released boxed. For instance cdp.pl (formerly part of CD Projekt, now a separate company) released a boxed version of Hard West, I think the only one in the world. There's also a pretty awesome steelbook edition of Machinarium here. I guess it's viable for local distributors because this way they can sell the games at a lower price than on Steam where we usually have standard European prices.

While you can burn/store your installers however you want, if the installer files aren't together, the setup will ask for it's location. If you cannot provide setup the file's location because it's on another disk that cannot be inserted into another drive the setup won't continue. I tested this for grins. However, I have not tried swapping disks during the file check to see what happens and if the install can be completed.

If you want to automate the process of segmented installers, you could always create a script of some kind that prompts you to install the respective DVDs, copies each file to a temporary folder, launches the installer when its done and then deletes the temp folder. That's what I do.

GOG's installers used to prompt you to specify the directory of the next segment if it couldn't find it in the current directory, but these days it just fails.