Well I'm surpised that your Toshiba DVD-ROM doesn't support sub-channel data. But your CD Burner no doubt will on reading. I have the 2502 and it does support SDD.

Normally you wouldn't bother preparing a cue sheet with CloneCD. The only time you would want to do that is if there is no sub-channel data (i.e. no SUB file is created) and you would want to burn back with CDRWin, perhaps after patching.