Here is a summary for putting your full name on a single line in the player window.
Add the playername element.
Offest the text of the HP gauge so that the last name lines up and the first name is outside the window.
Add the playername to the pieces
<Label item ="Player_Name">
<ScreenID>Player Name</ScreenID>
<Font>1</Font>
<RelativePosition>true</RelativePosition>
<Location>
<X>0</X>
<Y>0</Y>
</Location>
<Size>
<CX>124</CX>
<CY>14</CY>
</Size>
<Text>PlayerName123456</Text>
<TextColor>
<R>255</R>
<G>255</G>
<B>255</B>
</TextColor>
<EQType>1</EQType>
<NoWrap>true</NoWrap>
<AlignCenter>false</AlignCenter>
<AlignRight>false</AlignRight>
</Label>
<Gauge item = "Player_HP">
<ScreenID>PlayerHP</ScreenID>
<Font>1</Font>
<TextColor>
<R>240</R>
<G>240</G>
<B>240</B>
</TextColor>
<RelativePosition>true</RelativePosition>
<Location>
<X>0</X>
<Y>0</Y>
</Location>
<Size>
<CX>108</CX>
<CY>41</CY>
</Size>
<TextOffsetX>30</TextOffsetX>
<TextOffsetY>-12</TextOffsetY>
<GaugeOffsetY>14</GaugeOffsetY>
<Style_VScroll>false</Style_VScroll>
<Style_HScroll>false</Style_HScroll>
<Style_Transparent>false</Style_Transparent>
<!--<TooltipReference/>-->
<FillTint>
<R>200</R>
<G>50</G>
<B>50</B>
</FillTint>
<LinesFillTint>
<R>220</R>
<G>220</G>
<B>0</B>
</LinesFillTint>
<DrawLinesFill>false</DrawLinesFill>
<EQType>1</EQType>
<NoWrap>true</NoWrap>
<GaugeDrawTemplate>
<Background>A_GaugeBackground</Background>
<Fill>A_GaugeFill</Fill>
<Lines>A_GaugeLines</Lines>
<LinesFill>A_GaugeLinesFill</LinesFill>
<EndCapLeft>A_GaugeEndCapLeft</EndCapLeft>
<EndCapRight>A_GaugeEndCapRight</EndCapRight>
</GaugeDrawTemplate>
</Gauge>