How to handle DSTM files.

Dear all,
 
We have a small problem where someone had thick fingers and deleted an 
directory within one of the IBM directory structures.
That particular part is not saved regularly so no backup to restore from.
What we have are the OS Cd's.
We could de- and re-install the feature but that would do more than we wished 
for and would most probably cause 'work to be done'.
We try to avoid that.... and are looking for alternatives.
On the installation CD's we can find the product and the feature in case but 
those things are available as DSTMF.
 
Does someone know how to handle these DSTMF's and if (and than how) we could 
restore a specific directory from it??
...Ahmmm... In the mean time we have started to save the remains..... 
 
Kind regards,
Eduard.