When you say you had to kill it, do you mean you killed the DirectAdmin process?
When you *first* install Installatron, it will download and cache all the supported scripts to your server. That's about 36meg at the moment, and that process can increase the load for a while depending on how fast your server's connection is to various backbones.
But it still shouldn't take all that long, and it shouldn't increase the load to 30 (unless you're running out of ram or something?).
I can't think what else would cause that load. Installatron basically just does file manipulation, so you'd need like 100 users trying to install one of the big scripts all at the same time to get a 30 load, and even then it would only be short term.
The only explanation that I can think of is that it is running out of ram during the script caching. I imagine a server that has a load of 2 is pretty close to maxing out its resources.
Phil will be able to offer more suggestions on the technical side.
Row.