Need way to use custom create table syntax

Currently with oracle and LOB as column type for cache value the LOB data are tried to store inline. This is expensive and a major performance issue (for me).
Details to this: http://www.idevelopment.info/data/Oracle/DBA_tips/LOBs/LOBS_2.shtml

So I need for the 5.2 a way to provide custom create table syntax :-|

Maybe a workaround could that I execute ALTER TABLE statement after cache startup, but then I need to check table attributes first if alter table statement is nessessary. Provide own create table statement is much easier.