I had the same problem and solve. Look at:

RESTORE DATABASE [MYDB200to2008] FROM

DISK = N'E:\MSSQL10.IALPHA05\MSSQL\Backup\MYDB200to2008.bak'

WITH

MOVE N'MYDB200to2008_Data' TO N'E:\MSSQL10.IALPHA05\MSSQL\DATA\MYDB200to2008.mdf',

MOVE N'MYDB200to2008_FG_MaioresTab_1' TO N'E:\MSSQL10.IALPHA05\MSSQL\DATA\MYDB200to2008.NDF',

MOVE...