Ordering by IN

Hi,
I was wondering if it's possible to order the result set by some of
the set contained in an IN clause.

For example.
SELECT * FROM v_fol_unit_pub_utmpt WHERE folder_folder_object = 100120
AND unit IN ( 90072, 90005, 90074, 90075 ) AND unit_pub_type IN ( 2 )
AND utmpt IN ( 1 );

Results in.

folder_folder_object | unit | unit_type | unit_quantity |
unit_pub_type | utmpt
----------------------+-------+-----------+---------------+---------------+-------
100120 | 90005 | 101 | 1 |
2 | 1
100120 | 90072 | 101 | 1 |
2 | 1
100120 | 90074 | 101 | 1 |
2 | 1

When ideally I'd like to maintain the order as per ordered list of unit
ids passed in as the parameters.
Like so;

folder_folder_object | unit | unit_type | unit_quantity |
unit_pub_type | utmpt
----------------------+-------+-----------+---------------+---------------+-------
100120 | 90072 | 101 | 1 |
2 | 1
100120 | 90005 | 101 | 1 |
2 | 1
100120 | 90074 | 101 | 1 |
2 | 1

Is this even possible?

Thanks