A: UTXMP will be a Total Conversion Mod for UT2k4, hence you will ned to buy a copy of 2k4
B:There isn't going to be a UT2k5. Epic is coming out with a UT2k4: Editor's Choice edition for next year and the extra content will be downloadable for free.
B:There isn't going to be a UT2k5. Epic is coming out with a UT2k4: Editor's Choice edition for next year and the extra content will be downloadable for free.