SQL & PL/SQL :: Create External Table Based On Record Identifier?

I have a csv file which is in this format -

qwerty SCHEMATIC FILE
; Version 2007.7.1
Project,qwerty Project,,1,,7,1.5,1.5,1,1,0,,0,1,0,0,0,0,3,1,1,0,1,0,0,0,0,2,3,1,0,1,0,0,0,0,3,3,1,1,1,0,0,0,0,0,0,0,0,
abc,25150-28407.dat,,102,192,42,12632256,1,1,102,192,42,1,12632256,0,6,1,0,32896,1,0,0,0,0,,,-1,-1,-1,-1,0,0,0,-1,-1,-1
xyz, , , 0, 102, 0, 0, 0, 0, 0, 0, 0, 0, 0, , , , , , , , , , , 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
Product,00094416505678,19133,"24-36""X80"" FOLD DR VIA MEH",,4.5,81,3, 8421504,,0,,L.T.L. WHOLESALE.,abc,,0,0,0,
Product,00094416502345,37154,"24-36""X80"" xyz WHITE",,5,81,3, 8421504,,0,,L.T.L. WHOLESALE.,abc,,0,0,
Product,00094416501111,83120,"24-36""X80"" abc WH",,5,81,3, 8421504,,0,,L.T.L. WHOLESALE.,abc,,0

Can I create an external table for loading this file based on selection of fields driven by the record identifier which is the first field of each record, except for the firt two?

For e.g In the above file, for records which say 'abc' in it's first field, I want to load the 2,3,6,8 fields delimited by a comma (the values may as well be null in those fields) and for records which say 'Product' in their first fields, I want to load 5,8,9 and 10 fields from the same file. Basically, I want to know if we can use instr function while choosing the fields line by line based on a search criteria in the file. There will be less columns in my table than the number of fields in the csv file, so I guess I got to mention 'MISSING FIELD VALUES ARE NULL' option. There is another challenge too - I have to skip loading the first two lines from the file to the table.

I have written a big pl/sql proc for doing the same, using utl_file.get_line option, but it is still untested and I would be extremely happy to believe that this can be achieved by creating an external table too.