Dear one,
1) Arrange for the extensive White Umbrella (Sitatapatra) prayer to be recited at least 80,000 times, by the monks at Samdeling Monastery. You can go with the monk to request and arrange it. It should be explained to the monks to please do it very well. The monk can help to arrange it and also to get clear the appropriate money offering, to give you an idea of the cost.
2) Your friend should do Vajrapani/Hayagriva/Garuda retreat (this is one deity with three aspects). It is very important to do this retreat.
3) Request Geshe-la to do gagön puja in the evening time with your friend present.
4) In the evening, when it gets difficult (it could also be any time), you should listen to the Sutra for Entering the Great City of Vaishali. [Find links to Recitations for Alleviating Pain, in the FPMT Catalogue. This MP3 is an audio recording of Rinpoche reciting the Sutra for Entering the Great City of Vaishali and other prayers and mantras.]
If you find that listening to this sutra helps, then maybe your friend doesn't need the gagön puja, so you can check. Play the sutra in the bedroom and other rooms in the evening. .
5) It is important to circumambulate the Boudhanath Stupa. If you can, go there quite often and try to go around it as many times as possible, according to how much time you have. Take the opportunity to make strong prayers at the stupa. .
I am also making prayers and send my love...