I have tried that, and it didn't work (yes, I also use Vista). And I don't have a coreconfig.xml (I renamed a .txt file) and it says:
<mainconfig>
<settings>
<nick></nick>
<host>127.0.0.1</host>
<port>22004</port>
<password/>
<debugfile/>
<console_pos>0.000000 0.000000</console_pos>
<chat_font>1</chat_font>
<chat_lines>15</chat_lines>
<chat_color>0 0 128 100</chat_color>
<chat_input_color>0 0 191 110</chat_input_color>
<chat_scale>1.000000 1.000000</chat_scale>
<chat_input_prefix_color>172 213 254 255</chat_input_prefix_color>
<chat_input_text_color>172 213 254 255</chat_input_text_color>
<chat_width>1.000000</chat_width>
<chat_css_style_text>0</chat_css_style_text>
<chat_css_style_background>0</chat_css_style_background>
<chat_line_life>12000</chat_line_life>
<chat_line_fade_out>3000</chat_line_fade_out>
<chat_use_cegui>0</chat_use_cegui>
<mtu_size>0</mtu_size>
<menu_options>248</menu_options>
</settings>
<binds>
<bind key="num_0" control="fire"/>
<bind key="lctrl" control="fire"/>
<bind key="mouse1" control="fire"/>
<bind key="mouse_wheel_down" control="next_weapon"/>
<bind key="q" control="previous_weapon"/>
<bind key="num_dec" control="previous_weapon"/>
<bind key="mouse_wheel_up" control="previous_weapon"/>
<bind key="arrow_u" control="forwards"/>
<bind key="w" control="forwards"/>
<bind key="arrow_d" control="backwards"/>
<bind key="s" control="backwards"/>
<bind key="arrow_l" control="left"/>
<bind key="a" control="left"/>
<bind key="arrow_r" control="right"/>
<bind key="d" control="right"/>
<bind key="pgup" control="zoom_in"/>
<bind key="x" control="zoom_in"/>
<bind key="mouse_wheel_up" control="zoom_in"/>
<bind key="pgdn" control="zoom_out"/>
<bind key="z" control="zoom_out"/>
<bind key="mouse_wheel_down" control="zoom_out"/>
<bind key="enter" control="enter_exit"/>
<bind key="e" control="enter_exit"/>
<bind key="v" control="change_camera"/>
<bind key="home" control="change_camera"/>
<bind key="space" control="jump"/>
<bind key="rctrl" control="jump"/>
<bind key="lshift" control="sprint"/>
<bind key="num_1" control="look_behind"/>
<bind key="mouse3" control="look_behind"/>
<bind key="c" control="crouch"/>
<bind key="tab" control="action"/>
<bind key="lalt" control="walk"/>
<bind key="rctrl" control="vehicle_fire"/>
<bind key="lalt" control="vehicle_fire"/>
<bind key="mouse1" control="vehicle_fire"/>
<bind key="lctrl" control="vehicle_secondary_fire"/>
<bind key="num_0" control="vehicle_secondary_fire"/>
<bind key="a" control="vehicle_left"/>
<bind key="arrow_l" control="vehicle_left"/>
<bind key="d" control="vehicle_right"/>
<bind key="arrow_r" control="vehicle_right"/>
<bind key="arrow_u" control="steer_forward"/>
<bind key="arrow_d" control="steer_back"/>
<bind key="w" control="accelerate"/>
<bind key="s" control="brake_reverse"/>
<bind key="insert" control="radio_next"/>
<bind key="4" control="radio_next"/>
<bind key="mouse_wheel_up" control="radio_next"/>
<bind key="delete" control="radio_previous"/>
<bind key="r" control="radio_previous"/>
<bind key="mouse_wheel_down" control="radio_previous"/>
<bind key="F5" control="radio_user_track_skip"/>
<bind key="capslock" control="horn"/>
<bind key="lshift" control="horn"/>
<bind key="2" control="sub_mission"/>
<bind key="num_add" control="sub_mission"/>
<bind key="space" control="handbrake"/>
<bind key="rctrl" control="handbrake"/>
<bind key="q" control="vehicle_look_left"/>
<bind key="z" control="vehicle_look_left"/>
<bind key="x" control="vehicle_look_right"/>
<bind key="mouse3" control="vehicle_look_behind"/>
<bind key="mouse2" control="vehicle_mouse_look"/>
<bind key="num_4" control="special_control_left"/>
<bind key="num_6" control="special_control_right"/>
<bind key="num_5" control="special_control_down"/>
<bind key="num_8" control="special_control_up"/>
<bind key="delete" control="aim_weapon"/>
<bind key="capslock" control="aim_weapon"/>
<bind key="mouse2" control="aim_weapon"/>
<bind key="y" control="conversation_yes"/>
<bind key="p" control="conversation_yes"/>
<bind key="n" control="conversation_no"/>
<bind key="o" control="conversation_no"/>
<bind key="g" control="group_control_forwards"/>
<bind key="h" control="group_control_back"/>
<bind key="mouse2" state="down" command="driveby" arguments="1"/>
<bind key="mouse2" state="up" command="driveby" arguments="0"/>
<bind key="g" state="down" command="enter_passenger" arguments=""/>
<bind key="F12" state="down" command="screenshot" arguments=""/>
<bind key="t" state="down" command="chatbox" arguments="chatboxsay"/>
<bind key="y" state="down" command="chatbox" arguments="teamsay"/>
<bind key="F11" state="down" command="radar" arguments="1"/>
<bind key="F11" state="up" command="radar" arguments="0"/>
<bind key="num_add" state="down" command="radar_zoom_in" arguments=""/>
<bind key="num_sub" state="down" command="radar_zoom_out" arguments=""/>
<bind key="num_8" state="down" command="radar_move_north" arguments=""/>
<bind key="num_2" state="down" command="radar_move_south" arguments=""/>
<bind key="num_6" state="down" command="radar_move_east" arguments=""/>
<bind key="num_4" state="down" command="radar_move_west" arguments=""/>
<bind key="num_0" state="down" command="radar_attach" arguments=""/>
</binds>
<favourite_servers>
</favourite_servers>
<recently_played_servers>
</recently_played_servers>
</mainconfig>
So any help would be appreciated, because I wanna play
Thanks,
extenz
Edit: nevermind. I renamed the .mkv file to "blah.mkv" and it worked =]