\documentclass[10pt]{newlfm}

% This file demonstrates order differences in the specification of the date
% - in this case, from address is first, date is second, to address is
% third.

\newlfmP{leftmarginsize=.75in,busletter,orderfromdateto,noaddrfrom,%
letrh=mastd,sigtr=sLvBa,leftmarginskipright=15pt,topmarginskip=2pt,%
unprleft=25pt,unprright=40pt,rightmarginsize=154pt,unprtop=10pt,%
leftmargintopdist=.35in,useenvlab}%,cellowindow}

\begin{document}

\newcounter{zsentcnt}

\ltrbody{\tailor\ In terms of the relationships between font descriptions
  and musical typography, it seems to me that only in the case of the early
  1800s can even the slightest case be made for a relationship.  
\setcounter{zsentcnt}{0}
\loop \ifnum\thezsentcnt<100%
  \addtocounter{zsentcnt}{1}%
\thezsentcnt) Test test.
    \repeat%
}

\addrfromskipbefore{20pt}\dateskipbefore{20pt}\addrfromskipafter{5pt}\addrfromskipbefore{5pt}

\newcommand{\tailor}{A line that will differ from case to case.}
\oneletter{PIT}
\renewcommand{\tailor}{Of course, it doesn't have to, but it will anyway.}
\oneletter{CCR}
\renewcommand{\tailor}{Final test.}
\oneletter{CCR}

\end{document}

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