I have a relative who went through that several years ago.
It is called job club(don't know if still the same name) and it is located inside the same block as octave(the occupational therapy dept). If I remembered correctly, that block has a salvation army store as well.
The job training is not conducted by PSPs but by therapy assistants however, the options were quite limited at that time. My relative went through the one on cooking(including prep, hygiene, etc) but there are others like retail training as well. The salvation army store there is manned by such trainees if I'm not wrong. Once training done, the job club will source out suitable(ie those that are more patient) companies for those trainees. My relative was eventually matched as a kitchen assistant.