Hello,
There has been some discussion on maxima-lang-es about
functions to control the TeX environment (just the stuff which
goes at the beginning and end of a block of TeX output).
Towards that end I am planning to commit the TeX
environment functions described in this message ---
http://www.math.utexas.edu/pipermail/maxima/2007/007796.html
The discussion on this mailing list at the time the above
message appeared was mostly positive.
best
Robert Dodier