Copying a record and changing some fields in both record

[Shimon]

Hi Everyone,
If I have items in a catalog.
Each record has a catalog number.
I would like to copy an item from catalog 29 to catalog 30.
I need write code to
a) copy a the record and
b) add some notes to the copied record and
c) delete certain expenses related to the record from the original
record.(a few fields in the record.

I have had almost no experience working with recordsets, so some working
example would be much appreciated.

Shimon