Moving @ store and need help

I am moving my 2 stores from :censored:GoDaddy :censored: to Blue Hosting... I have tried to follow the tutorials but it is not working.... First... i followed the tutorials on the old host and changed the name of myadmin folder on the old store as the tutorials say to do so it does not match a freash install of Zencart ...question is how will this effect the upload when i ftp the files from old store up to the new store ? ..... second.... my database from the old host has a different username and password. When i do the fresh install from the panel on Bluehosting i do not see a place where i can change the DB_PREFIX during the install is this going to be a problem when i try to upload the SQL file from old store to the new database ? I need help with this cause i am so lost right now i cant see straight... :unsure: