I was reading up about it, and I had heard that UT GOTY was supposed to come with these two mods, but I noticed that the release I downloaded from here has neither. Is there any way I can get these mods so that I can try them out? Thanks. :D

EDIT: I managed to find ChaosUT on ModDB, and as for Rocket Arena, I'm not really so hung up about looking for it, so this thread is effectively solved. :P

UT GOTY CD2 did have ChaosUT, Rocket Arena, S3TC Textures
but there are newer versions of all these things elsewhere so your better off using those.

Here is rocket arena for you
http://ut-files.com/index.php?dir=GameTypes/RocketArena/