Hello
All new installations are done in unicode.
As you have an existing system which is a non-unicode system you cannot copy the existing system to the new system because of the unicode condition.
But if you want to switch the existing system to the new SAP system you have two options.
1 - Restore the database of the existing one to the new SAP system. Then like Susan mentioned you need to replace all the unicode kernel files with the non-unicode ones on the target system.
2 - If you want to keep the new SAP system as a unicode one and with the copy of the existing system then you need to perform unicode conversion.
Also I see that there is a change in the database version.
MSQL 2005 (existing) MSQL 2008 (new)
You might need to perform an upgrade of the database after the restore (just guessing as I dont know how MSSQL works)
Regards
RB