mp3 or wav (on mmc) as alarm tone?

you don'y need any third part software! just put it in to e:\sounds\ directory!

But that way I can use them as "ring" tone, not as "alarm" tone, can't I?

yes only as a ring tone! you can change alarm tone with Psiloc extended Profiles pro (but only one of the orginal rongtones... i guess)

I think both SmartProfiles from SymbianWare and Psiloc Extended Profiles can assign a wav file as an alarm.

I tried but they don't support wav or midi files saved on mmc; only if they are on the phone they can be used.
Poor. Wav use to be quite large.

as i told! you can use one of the standard ringtones for alarm tone!