ppm>search BioPerl 

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Bundle-BioPerl
A bundle to install external CPAN modules used by BioPerl 1.5.2
Version 2.1.8
Provide: Bundle::BioPerl ...etc

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> ppm install path-to-BioPerl-1.6.0           #from the DOS prompt
#or
> ppm install path-to-BioPerl-1.6.0.ppd

#I get the following errors, respectively: 
ppm install failed: Can't find any package that provides BioPerl-1.6.0
ppm install failed: 404 file does not exist

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