I've been thinking about this some more (after I replied to your EMAIL) and I was wondering - Why can't you use the Sheet for D&D3.0 ? Since you can customize almost everything, you can probably get away with creating a D&D3.0 compatible character !!
Skills: You can re-create the "old" skills, like Innuendo.
Classes: If the 3.5 class is different from the 3.0 class, you can simply create a NEW class (Call it "Ranger3.0") and redefine everything about it to make it 3.0 compatible !!
Did I miss something that the sheet can't do to support D&D3.0 characters ? (a multi-class 3.0 character would probably the biggest obstacle since I don't (yet) allow defining 2 classes...)
RiTz21