CRM Enhancement pack Upgrade

Hi Experts,

We have installed CRM 7.0 Ehp1 Ides version in our environment. Now we have to upgrade enhancement pack to  Ehp2 (i.e. CRM 7.0 Ehp2). Can you please let us know the pre-steps and post-steps for completing the Enhancement pack upgrade.

Can you please share us any documents if available...

Thanks in Advance...

Regards,

Krishna.M