I think there are two usb bootloaders from microchip. One is a HID Bootloader. I don't think it requires any dll's. It is located inside the huge files that you download as a group. Once all the Microchip Application Libraries v2010-02-09 is installed, the .hex file is located here: C:\Microchip Solutions\USB Device - Bootloaders\HID - Bootloader
I believe you can just bring the hidbootloader exe to a different computer, and program over the usb. But I have not fully tried it yet. I have only got to the point where my chip was regognized by a computer that has never had any microchip software loaded on it.
I need to try the executeable.





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