ServerPackages=SoldatUTv3in your UT2004.ini.
GameConfig=(GameClass="mduel2D.mduel2DDMgame",Prefix="2DDM",Acronym="2DDM",GameName="SoldatUT v3 DM",Mutators=,Options=) GameConfig=(GameClass="mduel2D.mduel2DTDMgame",Prefix="2DDM",Acronym="2DDM",GameName="SoldatUT v3 TDM",Mutators=,Options=) GameConfig=(GameClass="mduel2D.mduel2DBRgame",Prefix="2DBR",Acronym="2DBR",GameName="SoldatUT v3 BR",Mutators=,Options=) GameConfig=(GameClass="mduel2D.mduel2DCTFgame",Prefix="2DCTF",Acronym="2DCTF",GameName="SoldatUT v3 CTF",Mutators=,Options=) GameConfig=(GameClass="mduel2D.mduel2DINVgame",Prefix="2DDM",Acronym="2DDM",GameName="SoldatUT v3 INV",Mutators=,Options=) GameConfig=(GameClass="mduel2D.mduel2DDOMgame",Prefix="2DDOM",Acronym="2DDOM",GameName="SoldatUT v3 DOM",Mutators=,Options=) GameConfig=(GameClass="mduel2D.mduel2DONSgame",Prefix="2DONS",Acronym="2DONS",GameName="SoldatUT v3 ONS",Mutators=,Options=)Once that's done, go to (or create) your [xVoting.DefaultMapListLoader] section and change the line MapNamePrefixes= by adding the new map prefixes to it, separated by commas. It may end up looking like:
MapNamePrefixes=DM,DOM,CTF,BR,AS,ONS,VCTF,2DDM,2DBR,2DCTF,2DDOM,2DONS4. put the soldatUT maps in the map cycle list or set bUseMapList to false to enable selecting from all of the installed maps.