how to install xampp to external drive?

[hanpedro]

My box is yosemite x64 and I want to install xampp on external drive which is "/Volume/4_web".

Normally xampp install on "Application" at default Mac Hard Drive. But I have an external hard drive and I want to install xampp on this partition. Just like "/Volume/4_web/xampp".

Please let me know how to do it, or guide documents.

Thanks in advance.