i dont't like the idea of having more than one sp to do
an INSERT on the same table.
one version to receive varchar from another sp and the second
version to receive blobs from apps. (maybe i'm a crazy person)

if you can do:

insert into aTable(myblobcolumn)
values ('This is some text');

it's normal to think it must work:

execute procedure dostuff('This is some text');

where the param is a blob.

if firebird does'nt support this kind of calling, i'ts ok.
it does not support it and that's all.

thanks,
mariano