I picked up the LBA 48 CD and it worked flawlessly on a Philips DSR-704. I went to look for the modified kernel for 6.1 (R10) and was surprised to find only the following kernels:

• 3_1.1
• 3_1.5
• 4_0.1A
• 7_2.2_O
  

The ptv website states that support includes:

"Series2 Information

Currently, we recommend the use of this CD for upgrading the following Series2 models:

• Pioneer 810H and 57H DVR with DVD
• Toshiba RS/TX models with DVD
• TiVo Series2 TCD540 Models (the newest Series2 standalone units)
• HUMAX Series2 standalone units
• DirecTV/Hughes HR10-250 DVR with HDTV
• DirecTV R10 (the newest Series2 DirecTV systems
• Any Series2 Standalone Unit running version 7.X or newer of the TiVo OS
• Any Series2 DirecTV Unit running version 6.X or newer of the TiVo OS

These units all contain a newer version of the TiVo Operating System which has an updated kernel and supports drives larger than 137GB (also known as LBA48 support). This means you can use this CD, MFStools and BlessTiVo to restore images on drives with greater than 137GB capacity, and "Bless" drives that are greater than 137GB."

Does the modified kernel exist for this? Or am I on my own?

I've already modded the PROM so that's not an issue.

Thanks,

Mark