I think the only real problem that you might encounter is copying the actual formats about. The problem is that there's no way of directly copying them unlike the other data types e.g

format foo =
.

{
    package mypkg;
    *form_foo = *main::foo;
    *form_ref = *form_foo{FORMAT};
}

use Devel::Peek;

Dump(*main::foo);
Dump(*mypkg::form_foo);
Dump(*mypkg::form_ref);

__output__

SV = PVGV(0x80f9c78) at 0x8100de8
...
    FORM = 0x80fd4e4  
SV = PVGV(0x80f9dc0) at 0x8100e24
...
    FORM = 0x80fd4e4  
SV = PVGV(0x8101820) at 0x8100e3c
...
    FORM = 0x0
[download]

So you'll have to end up exporting entire globs into the given packages, which isn't ideal.
HTH

_________
broquaint

update: changed FORM to FORMAT