Zillion? How about only one: 
perl -ple "@f=split; for(@f[1..4]){ $_=0 if $_>1000 } $_=qq{@f}" infil
+e >outfile

[download]
or in-place: 
perl -i.bak -ple "@f=split; for(@f[1..4]){ $_=0 if $_>1000 } $_=qq{@f}
+" file

[download]
Update:

Better yet, -a saves us the trouble of splitting:

perl -lape "for(@F[1..4]){ $_=0 if $_>1000 } $_=qq{@F}" infile >outfil
+e

[download]
or in-place: 
perl -i.bak -lape "for(@F[1..4]){ $_=0 if $_>1000 } $_=qq{@F}" file

[download]

perlrun documents -i, -l, -a, -p and -e.

The command can be written in fewer strokes, but I left it readable.

In reply to Re: String Search/Replace by ikegami
in thread String Search/Replace by crep

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