Hi Manish,
I have done this exact thing recently and made some comments on how to do it and problems I had in the following threads:
On migration process:
http://moodle.org/mod/forum/discuss.php?d=28323&parent=133331
On crons (especially problems):
http://moodle.org/mod/forum/discuss.php?d=17359&parent=135946
There is another thread that may help here:
http://moodle.org/mod/forum/discuss.php?d=16738&parent=81073
Hope this helps,
Jason
Hardware and performance
Host Migration with Upgrade
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