I was meaning to get an external Dual Layer DVD-burner, but as prices seem to have dropped to no more than twice the price of externals I might as well try and get an internal replacement. Anyone know whether the internal Dual Layer DVD-burner Sony DWQ58A11T could be fitted in place of a Matshita CD-RW CW-8121 from a TiBook 550? It's inside my 400 now complete with the proper cable from the 550. I only have a small picture of the Sony inside a catalog, so it's hard to tell what standards its connectors have and so forth. Shouldn't the cable from the Matshita also work with a DVD-burner or do we have completely different connector standards for DVD-burners?