No one-way approach to learning ir remote control frequencies

[selbstdual]

I want to control my circuitry via a given infrared remote control
(for a Scott DVD-Player) producing unknown control frequencies.

All approaches I have seen so far need extra circuitry and output the
data to the pc showing it perfectly. But these are one-way
circuitries. Having found out the frequences, they are useless.

I want to get the frequencies via software and write them to the
eeprom to read them out on the pc and use them in the future.

I created a circuitry that sets PORTA.5(PIC = 16F628A) High or low depending on the
rc's ir-led being on or off.

Now I need software to cope with this information and to write it to
my pic. As I mentioned, I don't know the carrier frequency nor do I
know any other data about the control except that it produces light
and my circuitry receives it.

Suggestions ?