I overrode 0xE06 so I could have only the sources I needed. (I don't need "NoSrc" or Aux busses showing up). However, by doing that, I no longer inherit the source label assigned to that source.
<param baseurl="http://10.0.97.209/tmp/busestab.xml" constrainttype="INT_CHOICE" expand="true" oid="0xE06" precision="0" showlabel="false" style="size:Small;t:bg#FF0D0D;f:bg#readonlybg;" widget="radio-toggle">
<constraint key="0">BK</constraint>
<constraint key="1000">1</constraint>
<constraint key="1001">2</constraint>
<constraint key="1002">3</constraint>
<constraint key="1003">4</constraint>
<constraint key="1004">5</constraint>
<constraint key="1005">6</constraint>
<constraint key="1006">7</constraint>
<constraint key="1007">8</constraint>
<constraint key="1008">9</constraint>
<constraint key="1009">10</constraint>
<constraint key="1010">11</constraint>
<constraint key="1011">12</constraint>
<constraint key="1012">13</constraint>
<constraint key="1013">14</constraint>
<constraint key="1014">15</constraint>
<constraint key="1015">16</constraint>
<constraint key="10">BG</constraint>
<constraint key="100">M1</constraint>
<constraint key="101">M2</constraint>
<constraint key="102">M3</constraint>
<constraint key="103">M4</constraint>
<constraint key="25000">MinME1</constraint>
<constraint key="25100">MinME2</constraint>
<constraint key="25200">MinME3</constraint>
<constraint key="25300">MinME4</constraint>
</param>
So, instead of this:
<constraint key="1000">1</constraint>
I would like to dynamically have this (which is what I would get if I didn't override):
<constraint key="1000">Cam 1</constraint>