Yes, me too.
I fixed something which is definately a show-stopper with kernels 5530+ and PBL. I have tested this only on a slightly modified 5838 retail BFM bios and it works (whereas other PBL versions don't.) I haven't tested this on real 5530+ box so I'm not sure if there are some other problems, but this one is fixed. So, please, 5530 and 5713 kernel owners, test it. It should work on v1.6 boxes too then, but there's no BFM bios for them yet.
If this PBL works, maybe someone (me?) will make a BFM bios out of EvoX M8 for 5838 (and others). Also, I'll submit a package with source code to the usual places.
The problem that's fixed now is that the newer kernels set the code segment size to something too small for the bootloader (2bl) to be accessible.
This is based on PBL 1.3. You must put the correct RC4 key and EEPROM key to boot.cfg. In case you have problems, change Debug from false to true in boot.cfg and inspect the created log file (pbldebug.log) after running PBL.
I see that Tomilius suggested someone to work on the 5530+ problem. I'm not quite that fast.
I had already this done.
EDIT: forgot to mention. The package doesn't contain a bios image, so you'll need to get one from the usual places (a BFM (Bootable From Media) image!) and place it as xboxrom.bin in the same directory as the PBL. Try X2 4981 or EvoX M7.
EDIT2: now beta2.
EDIT3: forgot to sign beta 2 with habibi. Fixed now.
EDIT4: Problems with older Xboxes hopefully fixed now. Thanks to Tomilius and Ldots (for the information in the pbl-should-be-fixed thread).
EDIT5: just replaced the old beta3 with the latest.