Centos – Download ALL rpms for a product

I have two CentOS machines, one 6.3 box (A), and another CentOS 6.1. (B)

6.3 box is with internet connection, 6.1 box is without internet connection.

I want to download ALL dependencies of a product on Box A, then copy those n Box B, and install the product.

I tried with

yum --downloadonly --downloaddir=*~/downloadrepo* -y install *product*`
cd *~/downloadrepo*
createrepo .

Then I disabled all repos (with –disablerepo), except my repo, and installed product on the same machine (Box A). No errors.

• yum install *product*

Now when I copied this repo to Box B, and tried to install with same command,
it starts installing, but then gives lot of errors like below:

Error: Missing Dependency: libldap-2.3.so.0()(64bit) is needed by package php-ldap-5.1.6-27.el5_5.3.x86_64 (installed)

As there any way I can achieve what I need?

UPDATE

By the time I started working with option suggested by @rkosegi (–releasever=version), I was given a new box with same version CentOS 6.1 (C)

I tried above mentioned commands on Box C, and copied repo it to Box B. Still it failed.
The reason: though both boxes are 6.1, those are not identical (uname -r returns different strings).

Yum does not download dependencies, if those are already installed. So my repo did not contain some of the dependencies (including OpenJDK). So, when I try to install on Box B, it fails.

Quite frustrating!!!

But then I found command 'repotrack' here.

cd ~/downloadrepo
repotrack -p . -a x86_64 product
createrepo .

I got a lot more files than with yum, hopefully it will do the trick.

I'll update, once I try install.

UPDATE

Command repotrack did not work for me. When I tried to install from repository created with 'repotrack', got following errors:

Error: Package: perl-CGI-3.51-127.el6.x86_64 (repo-local)
       Requires: perl = 4:5.10.1-127.el6
       Installed: 4:perl-5.10.1-119.el6_1.1.x86_64 (@anaconda-CentOS-201112102333.x86_64/6.2)
           perl = 4:5.10.1-119.el6_1.1
Error: Package: audit-libs-python-2.2-2.el6.x86_64 (repo-local)
       Requires: audit-libs = 2.2-2.el6
       Installed: audit-libs-2.1.3-3.el6.x86_64 (@anaconda-CentOS-201112102333.x86_64/6.2)
           audit-libs = 2.1.3-3.el6

I tried removing these two files from folder, and rebuilding repository with 'createrepo'.
It gave another set of errors.

Not sure what options I have at the moment…