Database specific system copy procedure (Backup/restore) SQL2005

Hello All,

I have a little doubt in this, my current system is on ECC6 EhP 3 and i want to use ECC6 EhP 4 dvd/cd to make a export CD of source system. will it be a problem to use EhP 4 cd instead of Ehp3.

I did't find concrete information about the same in System copy document from SAP.

2ndly there is very little information about system copy using backup/restore method in the System copy document. so if somebody have any document on system copy using backup/restore that would be nice.

Mani