[aviatorsneah]

UI is outdated, as it is included in HSFX....and HSFX is included in UP2.0. So it's up to you which one you want to install. They both have the same things (UP2.0 might have a few extras). From what I understand, if you are going to play offline a lot, use UP. If you are going to be playing on the servers, use HSFX. I use UP2.0. But, it's up to you.