ORDER records based on parameters in IN clause

I have a stmt where the outer-query is limited by the results of the
inner query. I would like the outer query to return records in the same
order as the values provided in the IN clause (returned form the inner
query).

The inner_query is returning id's ordered by count(id) , i.e by most
common occurrence.

In essence,

when I say

select * from table where id IN (2003,1342,799, 1450)

I would like the records to be ordered as 2003, 1342, 799, 1450. The
outer query has no knowledge of the count(id) that the inner_query is
ordering by.

Currently postgres returns it in this order (1450,1342,799,2003)

Any help would be appreciated.

Thanks,

R. Verghese