Memorized Spells in 3.5e

Hi!

I'm running a campaign in the 3.5e ruleset and have a question about how to mark memorized spells?
In Xornes tutorial I noticed that there's a checkbox in the spell section on the character sheet.

In my 3.5e sheet, there is no such checkbox.
Am I running an outdated ruleset or should I simply transfer to d20 ruleset to get that functionality?

Thanks //Paul

Ty with d20_JPG rulsest! :)