Can I change the firmware of my 2510A on my PC so I can burn DVD+R's (single layer) with DVD-ROM booktypes then continue to use the drive on my MAC laptop?
With the appropriate firmware, yes. Just change drive's default: that's a permanent change.Happy New Year!
BinFlash should work on your Mac to change the bitsetting settings.
I use binflash on Linux, works great now after some problems under kernel 2.6.8-suse.