A 504 plan gets your DD only accommodations (reduced workload, preferential seating, etc)-- not services.
For fine and gross motor problems and memory deficits, I'd want an IEP in place-- this would provide direct services (PT, OT, access to 1:1 teaching with a special educator) to improve her functioning in these areas. Anything that costs the school money (personnel time) generally falls under the realm of an IEP.
To start this process, you need to request a formal evaluation from the school-- in writing-- and tell them all the areas in which you suspect deficits. After that, they are to convene a meeting and decide what she needs and how those needs will be met. The Wrightslaw book From Emotions to Advocacy has lots of information and sample letters.
HTH,
DeeDee
