I would like step-by-step instructions on how to enable codepage
CP1252 on my Debian Linux webserver.

This codepage comes from Microsoft/Windows. It contains extra
characters such as trademark (?) 0x99 and elipses (?) 0x85 which
iso-8859-1 does not have.

I currently have the iso-8859-1 codepage enabled, which is a subset of
CP1252. To enable iso-8859-1, I set my environment variable LANG=en_US
(it was LANG=POSIX). This box has a directory named
/usr/lib/locale/en_US with a few files in it.

When I run 'locale -m' on my server, CP1252 is one of the many choices.

I have a small test program that prints to the console the string
"1â2è3ü4?5?6", but what gets displayed is 1â2è3ü4?5?6. Note that the
iso-8859-1 chars are fine but the CP1252 chars show up as question
marks.

A good discussion of codepages is found at:
http://czyborra.com/charsets/codepages.html
http://www.bbsinc.com/iso8859.html

I have only basic knowledge of Linux.