Changed location of Time Machine - help?

[Ritte]

I've done a clean install of 10.8 on my macbook pro mid 2010 15".
Trying to set up a time machine on it using an old time machine-hdd.

In 10.7: TM saved to External hdd/Username MBP.dmg/backups.backupdb/Username MBP/

In 10.8: TM saved to External hdd/backups.backupdb/Username MBP/

How do I change the location of the TM-backup? I want the TM to continue to backup in the same folder so that I can see the old files when I enter Time Machine. I want to save the backup in the "backups.backupdb" inside the .dmg-image (as in 10.7).

 

[Bear]

...
In 10.7: TM saved to External hdd/Username MBP.dmg/backups.backupdb/Username MBP/

In 10.8: TM saved to External hdd/backups.backupdb/Username MBP/
...

I've initialized Time Machine disks in both 10.6 and 10.7 and had the disk layout you describe for 10.8. What you're showing for 10.7 looks like it was a Time Machine disk that was used for network based backups.