Sd2Rd Hangup

I've been converting a number of .sgml S-documentation filed to .Rd format
and a few persistent complications--all involving the documentation's
examples--have arisen every time I issue the standard R CMD check to prepare
my project for building. The impression I get is that the check script
simply tries to execute every R command in the included documentation's
example{ } sections. But since Sd2Rd essentially dumps an S-documentation
file's example contents into the new .Rd file, formatting problems crop up.
Correct me if I'm wrong, but Sd2Rd neither strips each example line's
opening greater-than (">") nor prunes the output. And then check barks at me

when R can't execute either of the ">"-padded example code or the actual
output, which I didn't even intend for it to try to interpret in the first
place. In the meantime, I've been using a Perl script that sifts through a
set of .Rd's and makes the proper connections, stripping all ">"s and
sticking "\dontrun"s around the output, but I was wondering if there's a
better or built-in way. Any advice?

I've been converting a number of .sgml S-documentation filed to .Rd format
and a few persistent complications--all involving the documentation's
examples--have arisen every time I issue the standard R CMD check to prepare
my project for building. The impression I get is that the check script
simply tries to execute every R command in the included documentation's
example{ } sections. But since Sd2Rd essentially dumps an S-documentation
file's example contents into the new .Rd file, formatting problems crop up.