Do you know if there's a way to queue these CIA installs in FBI, or am I doomed to suffering installing 149 CIAs one-by-one?
I believe that there's a Install All option, just make sure that all CIAs are in the same folder. There should be some folder options at the top where you'll be able to select Install All (or Install + Delete All option, if you don't want to keep it). I haven't used FBI much in the past because I primarily use
custom-install for installing games directly to the SD card.
FBI is fine to use every now and then (even all the time, if you're patient enough), but its installation speed is limited to what 3DS hardware can offer.
With custom-install, you're installing CIAs directly to the SD card from your PC which is much faster. Just select all the files that need to be installed and let it do its thing. Once complete, put in the SD card in the 3DS of yours and run
custom-install-finalize.3dsx.
If you want to set it up, there are instructions how to do so on the Github page, but
here's a decent video tutorial if you like that more. There are two things that I'd do differently:
1) After you
dump boot9.bin and movable.sed to your
gm9/out folder on your SD card, just leave them there.
ci-gui will automatically find them once you select your SD card in it.
2) You can download s
eeddb.bin from
here and place it inside a
custom-install-standalone folder.
After that, you're good to go.