Inserting a record into another table ... inside a schema

Hi,

I have a public schema with all my tables in it.

I also have a schema for each company that uses our system .. so 300
companies = 300 schemas. One of the tables has a trigger that is trying
to insert/update another table that is inside the same schema. So far so
good. However when I update the base table in schema "MySchema" the
trigger tries to insert/update a record in the public schema and not the
"Current" schema (ie the schema of the original table). Is there a
system variable for "Current Schema" ? .... If not what is the best way
to achieve this ?

Thanks

Paul Newman