It depends on the DPE... some of them don't mind doing things that any passenger would usually do, like holding charts etc. There are some examiners out there (usually from the FSDO) who won't help you and simply say, "I'm not here" before the checkride begins.
I've never asked the DPE to help me with CRM stuff like holding charts but even if I did, I bet that no one would refuse. The pre-take off briefing is a perfect time to ask. If you just ask them to hold a chart, it probably catches them off guard, hence the "funny look".
Cockpit management, especially in IFR, is critical. Not to mention that holding charts is one thing, asking the DPE to pull your approach plates for you, start your time or read the checklist for you in a single pilot airplane is another thing.