DTR for custom package in EP6

Hi,

We are currently on EP5 using a custom developed MSS package with PDK. We are going to migrate to EP6 and install standard mss package 60.1.5 and use only selected standard functionality useful for us

We are also planning to use DTR for version control.

1. I would like to know whether is there any standard way or guidelines suggested by SAP.

2. Anybody have done such kind of implementation and would like to share their views.

3. Is it a good idea to move all custom developed components in to DTR and leave the standard components as such or move all custom and standard components in to DTR.

Regards,

Arun