Mass creating of an attachment in AS03

Hi,

I need to create an attachment or at least create a note to more than 10 000 asset master records in SAP.

Is there any way how it can be possible to do on a mass scale (not one by one throught GOS in AS03)?

This advice would be very helpful.

I dispose of standard  asset transactions and of a few another transactions but no LSMW and so one.

Thanks a lot