24 to 96V Boost Converter independent from the load
If you are looking for a general tool or guide to switch mode power supply design, there are several on the net, as well as free online design tools on the web sites of manufacturers such as:


Fairchild Semiconductor: Power Supply WebDesigner
Linear Technology: LTPowerCAD
Texas Instruments: WeBench Power Designer, SwitcherPro Design Tool


These tools require information about input supply (AC or DC, voltage range) and output requirements (Voltage, acceptable ripple, current rating), and provide suitable part numbers and computations - evidently favoring the respective manufacturer's products, of course. 

Many of these tools go as far as providing a schematic, a bill of materials,  performance parametrics and even design simulation, all for free.

A boost regulator design does not need the load resistance to be known in advance: There would be a minimum load current specified for stability in many designs, and of course a maximum current rating depending on the switching devices used (internal MOSFETs in the boost controller, external power MOSFETs etc). As long as the load is within those two limits, the boost regulator would supply the desired voltage to the load. 

Note: I've already checked with TI WeBench Power Designer but it cannot find a suitable solution to your requirements, so perhaps you can skip that one and try the others.