Check out ALTER DATABSE in BOL, something like:
ALTER DATABASE database name SET RECOVERY {FULL | SIMPLE | BULK_LOGGED}

In SQL 2000 you could also change the recovery model through EM by right clicking on the database name select properties, click the options tab and change the recovery model. I havent used 2005 yet so not sure how well that description matches.

If you set your model database's recovery model to simple then any new database you create will automatically be created in the simple recovery model.

Does this help?

>How do I make that change?
>
>>Considering you are not using the LDF for backup purposes I would set the backup model to simple this means that none of the transactions will be written to the log and therefore not grow.
>>
>>Regards
>>
>>Jon
>>
>>
>>>Each night we will be doing a NET STOP, backing up our MDF, LDF, master and model databases, then doing a NET START. My ISP said that since we aren't using the SQL Server backup, that the LDF file will grow over time and affect preformance. He recommends reducing this file in size once per week. He used the word "truncate". A couple of questions.
>>>
>>>1) Do I need to worry about the LDF's growing?
>>>2) Is a truncate the same as the term "shrink" that I see in the Mgt Studio UI?
>>>3) Is there a command that I can issue to accomplish this instead of going into the Mgt Studio UI once per week?