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It didn't work because a pair of brackets was missing. The exact syntax is:
\newcommand{\ans}[1]{\underline{\underline{#1}}}

I'm not sure I understand very well what you require, but notice that \multirow{n}{*}{fiddledeedee} adapts the width of your multirow cell to the natural width of its contents. Is that what you want to do?

B.A.

If it's only for single characters you just have to type \textbf A (without brackets}, \textbf B and so on.

B.A.

With the paralist or shortlst packages. The first one has an inparaenumerate environment, the second a runenumerate one.

B.A.

No. Every file used by latex must be in directory searched by tex at compiling time and there is a strict organisation called TDS (TeX Directory Structure). So your file should be, not only in ...\texmf, but in ...\texmf\latex\packagename\, or or, if it consists of a single file, grouped with other ...

I know how to implement (I think) under MiKTeX. Do you use this distribution? You also may add C:\bibfile to the path. Which editor do you use? It might be more or less simple for me, according to the one you use.

BIBINPUTS can be specified in System Properties->'Advanced' tab -> 'Environment ...

I see two possibilities: 1) launch bibtex with a switch: --enable-directory=... 2) there is an environment variable used by bibtex: BIBINPUTS qui contains extra paths fo fonding bib files.Specify your path in either way. All this corresponds to the MiKTeX distribution, but there must be the ...

Why do you need the minipage environment? Use subfloat, from subfig package, instead. You'll obtain your (sub)captions.

Regards,
B.A.

Convert your eps to pdf with eps2pdf... Btw, you don't have to specify the extension: with pdfoutput=1, the compiler will choose figure1.pdf, and with pdfoutput=0, it will choose figure1.eps. Also, you don't have to give the width or height of your figure, if the bounding box is correct, unless you ...

Two questions: 1) what is your preamble? 2) where exactly did you put the tfm's?

I tried to compile mbbtest.tex (with plain TeX) in the distribution, and it worked perfectly. You should give it a try and look at the log.

B.A.