I'm trying to find a way to convert a Salesforce Opportunity into a Custom Object (termed "Projects" in this specific instance of Salesforce)
I would want to transfer data over from the opportunity to the custom object, and allow for editing in the new location, without affecting the old (though if it does affect the old, this is not necessarily a deal breaker).
I've been reading about how there are crossover object formulas, and custom buttons - but I'm not really seeing any sources on them, or what to use in this particular case.
I can't use Apex - I only have access to the professional version.
What's the most elegant solution to solving this problem?