call perl with the -I flag, followed by the path to your install of the modules. Directories following -I are prepended to @INC. You could also use unshift. i.e. 
...
unshift @INC, '/path/to/your/modules';

use YourModule;
...

[download]
Update: As chromatic pointed out, that unshift needs to be in a begin block

In reply to Re: Precedence in @INC by omnibus
in thread Precedence in @INC by digger

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