Thanks to minicpan, I keep a local copy of the latest versions hosted on CPAN.
Running minicpan weekly, I keep it up to date.
My .minicpanrc file: 
local: /home/netbook/minicpan/miniCPAN_20140405/
remote: http://your.favorite.cpan.mirror/
also_mirror: indices/ls-lR.gz

[download]
Now, I want to carry my local minicpan keeping it on a memory stick.
Changing .minicpanrc to: 
local:  /media/USB16GB/miniCPAN_20140405/
remote: file://home/netbook/minicpan/miniCPAN_20140405/
also_mirror: indices/ls-lR.gz

[download]
and running minicpan again, sweeps my minicpan onto my stick.
Fine.
Now, I can install any module offline (as long as specific version dependencies are satisfied).
Just mount my stick and either, first time running cpan: 
...

Would you like to configure as much as possible automatically? [yes] 
...
sites for you? (This means connecting to the Internet) [yes] no
...
Would you like to pick from the CPAN mirror list? [yes] no
...
Please enter your CPAN site: [] file:///mnt/minicpan
Enter another URL or ENTER to quit: [] 
New urllist
  file:///mnt/minicpan/

Autoconfiguration complete.

commit: wrote '/home/userOne/.cpan/CPAN/MyConfig.pm'
...

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or by modifying manually ~/.cpan/CPAN/MyConfig.pm 
...
  'urllist' => [q[file:///mnt/minicpan]],
...

[download]
So, it's easy installing modules on offline systems or installing apps on user (e.g. /home/user) Perls.

Have fun!

UPDATE: After discovering how to comment, my .minicpanrc looks like: 
## web ---> local disk (computer A)
#local: /home/netbook/minicpan/miniCPAN_20140414/
#remote: http://your.favorite.cpan.mirror/
#also_mirror: indices/ls-lR.gz

## local disk (computer A) ---> USB
local:  /media/USB16GB/miniCPAN_20140414/
remote: file://home/netbook/minicpan/miniCPAN_20140414/
also_mirror: indices/ls-lR.gz

## USB ---> local disk (computer B)
#local:  /home/dan/miniCPAN/miniCPAN_20140414/
#remote: file://media/usb/miniCPAN_20140414/
#also_mirror: indices/ls-lR.gz

[download]

In reply to Carrying (mini)CPAN by fishy

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