Just a little work can modify the base warrior and adept classes quite easily; ask the players where they want to come from, and present them with either a pre-prepared list of feats, or add in your own (appropraite) class features.
I wouldn't really recommend using the base D+D classes, since I think gain less skills, and they certainly work to a lower power level than the base Lone Wolf classes.
Also the problem with using a list of feats over assigned class features (even if the said class features were originally feats) is that the character doesn't really seem unique, as most of the Lone Wolf chars do. The interesting thing about LW is that the classes feel like specific Prestige classes, but retain the generalisation of normal classes and the associated player choice.