Don't know if i will be of help, because i do not have DID...anyways

The first 3 times i was hospitalized were for suicidal ideation, and self injury, although i was psychotic at these times as well (i have schizophrenia) the hospitalizations were more for the suicidal ideation and SI
I was hospitalized for a fourth time last March. This time it was just for my "psychosis" i was having hallucinations and paranoid delusions and what not. I was not Suicidal or SI'ing at this time.

I have not been suicidal or done any SI'ing for a long, long time, yet my schiz symptoms are still progressing, so i have been thinking about going to a residential. My problem though, is really that i don't want to get "better" because i feel so uncomfortable being without the schiz symptoms, since i have had them all my life. Yep, i actually hate NOT having the hallucinations and such.
But right now i am doing ok. I am still having some symptoms, but i recently came out of my last relapse, so things aren't so bad right now.

If your talking about a short term hospitalization for the DID, i don't know how much that would really help. The short term hospitalizations (the ones that last from about 3 days to 2 weeks) are more for people who are a danger to themselves or others and they go into the hospital to try and get stabilized on meds. But maybe a more long term hospitalization--like a residential would help. because this would give you an opportunity to have intense daily therapy and such and may help you recover.

good luck

-Becka