I also had problems finding an instagib mod based on the ioq3 source-code.
So i build one myself.
You can download ioq3-instagib here:
(you'll need to have ioquake3 installed)
Have fun with it and please report issues ;)
I made a poorly constructed nailgun-only mod almost 9 years ago.
The ghost of planetquake still has it for viewing
I hope you're still around. I just installed both your mods on my MacBook Pro. This is a great flashback for me as q3a was and still is one of my favourite games. Especially the instagib mod. I got the normal mod going but your instagib mod for Team Arena crashes the game and puts me back to the desktop. Do you have any ideas why this might be?
Also, if you know any good instagib map packs let me know. I want to get back into it. 8)