Why set booktype to -R ? I always set booktype to DVD-ROM for DVD+R and DVD+R DL media. My Sammy 605 never had any problems loading discs burned with DVD-ROM setting. I'm using a NEC ND-3520AW with Liggy & Dee's 2.U4 RPC1 bitsetting firmware for what it's worth.
sirlemonhead posted it in the AvP thread at xbox-scene, why he posted broken source I don't know. However some members at xbox-scene got a pre-compiled alpha/beta version to test. I'm not one of them unfortunately.
The source code doesn't work, compiling errors. sirlemonhead, the author, already posted about the error on Xbox-scene forums. We'll just have to wait for him to sort it out.