I'm not sure, from your post, what you are trying to accomplish.
If you need to know the carrier frequency of the IR you can record an image of it using a PC parallel port and then determine the carrier frequency from the recorded data. See http://www.ziplabel.com/cir/index.html for schematics and software.
You can also check the files at http://www.RemoteCentral.com for your specific remote or the hardware it was designed for. If it's listed, you can get the carrier frequency from the CCF files there.
Once you have the carrier frequency and the timings for the IR bursts, you can use HPWM to create the carrier, switching the pin from output to input to turn the bursts on or off.
You will likely find the current from a PIC pin insufficient to drive an IR emitter for anything other than close range. Check http://www.rentron.com for IR project schematics.
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