Spring RTS Engine

I don't have much of a clue about how CEGs work, and the wiki page is quite out of date...

http://spring.clan-sy.com/wiki/CustomEx ... Generators

Could some kind someone-in-the-know please update it by any chance?

Well imo there isn't much that could be updated here. Just print out the projectile.txt like it's described there and have a look at the possible generators you can use. The given options should be self-explanatory then and the only options which are not are explained can be looked up HERE and HERE...

Apart from that you also can use mods as a very good learning source although you shouldn't start with that complex nuke FX from CA for example...