Never heard of "Turbo Memory", but assuming it's an application of some sort, getting it to start at login is easy:
Open your System Preferences, then go to Accounts, click on your account on the left, click the Startup Items tab, then click the plus and select the program or drag it into the window.
That assumes you have 10.3; the process is similar in 10.2, but I don't remember exactly what it is--try Mac Help.