Want To Save Part Of Transactions When Rollback

Hi All,
I have set of stored procedures under one transaction where as each SP saves the data in one table and any error occurs then it saves the error details in errorlog table in the same SP. Whenever error occurs, all my transactions including error logging also getting rolled back. I want to keep the error logging part alone when my transaction is getting rolled back.....
That is,
try
{
Transaction A
{
Storedprocedure A
StoredProcedure B
StoredProceudreC
commit Transaction A

}
}
catch()
{
rollback A
}


Where as,
My each SP might contains the statements like,
StoredProcedure A
{

insert values in table A
if ( @@Rowcount =0)
insert values in errorlog ('Error occurred in table A')
}


Now, if any error occurs in Transaction A, all my values stored in 'errorlog' also getting rolled back. Is that any way to stop rollback only for errorlog table in the entire transaction?
(Tried using triggers, that was also not helpfu
SavePoint will save unnecessary part also.. ).

Is that any way to track the error and maintain in errorlog?

ManyThanks in advance,
Jaya