USB Bootloader for 18LF8722 within DLP-245GL-P

[oldnewbie]

Hi,
I am looking to implement a usb bootloader for an 18LF8722 within a DLP-245GL-P. www.dlpdesign.com/usb/245pl.shtml

I've found the DLP-245GL-P to be a good introduction/development platform for me and want to extend my application development on this platform to include bootloading via USB.

The CCS example bootloader and Tinybootloader, as discussed in numerous posts in this forum would all need considerable development work to get them to operate via the usb interface of the DLP-245GL-P board. And trying to understand all the nuances of bootloading simply from looking at the code is beyond me.

Is there a good guide to writing/developing a bootloader for 18 series PIC's ? Better still, something based on the CCS compiler (and MPLAB)

I like the features of Tinybootloader (no re-vectoring of interrupts) but the source for this is assembler and I'd much prefer a C source as my starting point. The CCS example bootloader is not a great starting point either as it does not have easy integration features

Thanks.