The London-based agency is working on a pro bono basis with the Disasters Emergency Committee, the charity fundraising coalition that includes Oxfam and British Red Cross.
The Relations Group is organising a 'media day' tomorrow (Friday 1 May) for radio and TV broadcasters to interview spokespeople from three charities involved in the appeal, some of whom have recently returned from affected areas of Nepal.
The agency is also putting together an appeal video for use by broadcasters, which will be ready early next week, in order to give the appeal longevity.
The DEC appeal raised £19m in its first day following the earthquake on Saturday.
Adam Cox, MD of The Relations Group, said: "We wanted to take an extra step and use our core service to provide the chance for the Disasters Emergency Committee to talk to local people about how they might be able to help."