The easiest is to recompile perl to different locations. For example: 
# extract perl distribution and then:
sh configure.gnu --prefix=/usr/perl5.10.0
make all test && sudo make install

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In reply to Re^3: RFC (tutorial): "Vendor code, Your code", PERL5LIB by eserte
in thread RFC (tutorial): "Vendor code, Your code", PERL5LIB by locked_user sundialsvc4

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