[NTG-context] Page Numbers in TOC; setuplabeltext

[Neal Lester]

>
>\definelist [myappendixlist]
>\setuplist [myappendixlist]
>[pagenumber=no,alternative=b,label=yes,conversion=Character]
>
>\definehead[myappendix][title]
>\def\appendixlabel#1#2{Appendix #1: #2}
>\setuphead[myappendix][command=\appendixlabel]
>%
>\setuplabeltext [en][myappendix=Appendix~]
>
>\newcounter\myappendices
>
>\long\def\myappendix#1%
>     {\ifhmode\unskip\fi
>      \doglobal\increment\myappendices\relax
>      \high{\myappendices}%
>      \expanded{\writetolist[myappendixlist]{\myappendices}}{#1}}

3) How can I make the numbers in myappendixlist appear as A B C (as 
Appendix does) instead of 1, 2, 3

Sorry about the second post!

Neal