Step  1

<update>c1-PC_10001 New York</update>   (you can name "PC_10001 New York" as you prefer.) Set a channel line:

<channel update="i" site="tvtv.us" site_id="10001" xmltv_id="New York">New York</channel>

run WG++  once, it will produce a new list (for the providers available) called "tvtv.us.channels.PC_10001 New York.xml"

Step 2
We get a line from the above xml "tvtv.us.channels.PC_10001 New York.xml" as example:

<channel update="i" site="tvtv.us" site_id="USA-DITV501-X" xmltv_id="DIRECTV New York">DIRECTV New York</channel>

we also change update to C2 to reflect the new naming for the new channel list, so we set:

<update>c2-10001-USA-DITV501-X-DIRECTV New York</update>  (you can name "10001-USA-DITV501-X-DIRECTV New York" as you prefer) and we add the corresponding channel line

<channel update="i" site="tvtv.us" site_id="USA-DITV501-X" xmltv_id="DIRECTV New York">DIRECTV New York</channel>

we do again a wg++ run to get the final channel list which will be named "tvtv.us.channels.10001-USA-DITV501-X-DIRECTV New York.xml"

Now we only need to set update to "f" or "i" and channels line from "tvtv.us.channels.10001-USA-DITV501-X-DIRECTV New York.xml" to get our epg

<update>i</update>
    <channel update="i" site="tvtv.us" site_id="USA-DITV501-X##91035" xmltv_id="WINS">WINS</channel>
    <channel update="i" site="tvtv.us" site_id="USA-DITV501-X##16689" xmltv_id="WCBSDT">WCBSDT</channel>
    <channel update="i" site="tvtv.us" site_id="USA-DITV501-X##11331" xmltv_id="WCBS">WCBS</channel>
    <channel update="i" site="tvtv.us" site_id="USA-DITV501-X##11705" xmltv_id="WNBC">WNBC</channel>
    <channel update="i" site="tvtv.us" site_id="USA-DITV501-X##20459" xmltv_id="WNBCDT">WNBCDT</channel>
    <channel update="i" site="tvtv.us" site_id="USA-DITV501-X##11746" xmltv_id="WNYW">WNYW</channel>
    <channel update="i" site="tvtv.us" site_id="USA-DITV501-X##20360" xmltv_id="WNYWDT">WNYWDT</channel>