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