Hi Angie
There is an entry for Helen on IGI, actual extract from the OPRs:
HELEN LAPRAICK Christening: 20 DEC 1789 Sorn, Ayr, Scotland
Parents: Father: JAMES LAPRAICK Mother: MARY KIRKLAND
This looks like the parents' marriage from IGI:
JAMES LAPRAICK Marriages: Spouse: MARY KIRKLAND
Marriage: 20 FEB 1789 Sorn, Ayr, Scotland
A parent search on IGI for siblings for Helen unfortunately doesn't show any more siblings. Not to say they are not there, maybe down to spelling variants of Lapraick.
In respect of James, there doesn't appear to be any birth records (actual extracts from the OPRs) on IGI before 1820. Have a look at
http://freepages.genealogy.rootsweb.com/~hughwallis/IGIBatchNumbers/CountyAyr.htm#S which shows what records are available by area.
Regards.
Monica
ADDED: I found two sisters for Helen. LAPRAIK without the C shows:
1. AGNES LAPRAIK Christening: 06 AUG 1795 Sorn, Ayr, Scotland
2. MARY LAPRAIK Christening: 11 MAR 1800 Sorn, Ayr, Scotland